- 爬取代码:
import requests
import json
import os
def writefile(res):
with open("F:/myfiles/3、ACM/codeforces 题集/tree and constructive algorithms(rating1500-2300).txt", 'w') as f:
num = 1
for i in res:
f.write(str(num) + ". " + i + '\n')
num = num + 1
print(i)
if __name__ == '__main__':
url = "http://codeforces.com/api/problemset.problems?tags=trees&tags=constructive%20algorithms"
response = requests.get(url)
content = json.loads(response.text)
problems = content['result']['problems']
res = []
for problem in problems:
url = "http://codeforces.com/contest/"
contestid = str(problem['contestId'])
index = str(problem['index'])
tags = str(problem['tags'])
rating = None
if 'rating' in problem.keys():
rating = problem['rating']
if not rating or rating <= 2300 and rating >= 1500:
url = url + contestid + "/problem/" + index
res.append(url + " tags:" + tags + " rating:" + str(rating))
writefile(res)
链接: http://codeforces.com/contest/1325/problem/C
tags:constructive algorithms ,dfs and similar ,trees
rating:None
2.
链接: http://codeforces.com/contest/1324/problem/F
tags:dfs and similar ,dp ,graphs ,trees
rating:2000
3.
链接: http://codeforces.com/contest/1305/problem/D
tags:constructive algorithms ,dfs and similar ,interactive ,trees
rating:1900
4.
链接: http://codeforces.com/contest/1297/problem/E
tags:*special ,dfs and similar ,trees
rating:None
5.
链接: http://codeforces.com/contest/1304/problem/E
tags:data structures ,dfs and similar ,shortest paths ,trees
rating:2000
6.
链接: http://codeforces.com/contest/1294/problem/F
tags:dfs and similar ,dp ,greedy ,trees
rating:2100
7.
链接: http://codeforces.com/contest/1292/problem/C
tags:combinatorics ,dfs and similar ,dp ,greedy ,trees
rating:2300
8.
链接: http://codeforces.com/contest/1285/problem/E
tags:brute force ,constructive algorithms ,data structures ,dp ,graphs ,sortings ,trees ,two pointers
rating:2300
9.
链接: http://codeforces.com/contest/1285/problem/D
tags:bitmasks ,brute force ,dfs and similar ,divide and conquer ,dp ,greedy ,strings ,trees
rating:1800
10.
链接: http://codeforces.com/contest/1286/problem/B
tags:constructive algorithms ,data structures ,dfs and similar ,graphs ,greedy ,trees
rating:2000
11.
链接: http://codeforces.com/contest/1278/problem/E
tags:constructive algorithms ,dfs and similar ,divide and conquer ,trees
rating:2200
12.
链接: http://codeforces.com/contest/1278/problem/D
tags:data structures ,dsu ,graphs ,trees
rating:2100
13.
链接: http://codeforces.com/contest/1280/problem/C
tags:dfs and similar ,graphs ,greedy ,trees
rating:2000
14.
链接: http://codeforces.com/contest/1245/problem/D
tags:dsu ,graphs ,greedy ,shortest paths ,trees
rating:1900
15.
链接: http://codeforces.com/contest/1244/problem/D
tags:brute force ,constructive algorithms ,dp ,graphs ,implementation ,trees
rating:1700
16.
链接: http://codeforces.com/contest/1238/problem/F
tags:dfs and similar ,dp ,graphs ,trees
rating:2300
17.
链接: http://codeforces.com/contest/1223/problem/E
tags:dp ,sortings ,trees
rating:2200
18.
链接: http://codeforces.com/contest/1210/problem/C
tags:math ,number theory ,trees
rating:2100
19.
链接: http://codeforces.com/contest/1220/problem/E
tags:dfs and similar ,dp ,dsu ,graphs ,greedy ,trees
rating:2200
20.
链接: http://codeforces.com/contest/1214/problem/E
tags:constructive algorithms ,graphs ,math ,sortings ,trees
rating:2000
21.
链接: http://codeforces.com/contest/1213/problem/G
tags:divide and conquer ,dsu ,graphs ,sortings ,trees
rating:2000
22.
链接: http://codeforces.com/contest/1193/problem/B
tags:*special ,data structures ,dp ,trees
rating:None
23.
链接: http://codeforces.com/contest/1192/problem/B
tags:*special ,data structures ,dfs and similar ,divide and conquer ,trees
rating:None
24.
链接: http://codeforces.com/contest/1184/problem/E2
tags:dfs and similar ,graphs ,shortest paths ,trees
rating:2200
25.
链接: http://codeforces.com/contest/1184/problem/E1
tags:graphs ,trees
rating:2000
26.
链接: http://codeforces.com/contest/1188/problem/A1
tags:trees
rating:1600
27.
链接: http://codeforces.com/contest/1187/problem/E
tags:dfs and similar ,dp ,trees
rating:2000
28.
链接: http://codeforces.com/contest/1181/problem/D
tags:binary search ,data structures ,implementation ,sortings ,trees ,two pointers
rating:2100
29.
链接: http://codeforces.com/contest/1176/problem/E
tags:dfs and similar ,dsu ,graphs ,shortest paths ,trees
rating:1700
30.
链接: http://codeforces.com/contest/1172/problem/B
tags:combinatorics ,dfs and similar ,dp ,trees
rating:2000
31.
链接: http://codeforces.com/contest/1175/problem/E
tags:data structures ,dfs and similar ,divide and conquer ,dp ,greedy ,implementation ,trees
rating:2200
32.
链接: http://codeforces.com/contest/1174/problem/F
tags:constructive algorithms ,divide and conquer ,graphs ,implementation ,interactive ,trees
rating:2300
33.
链接: http://codeforces.com/contest/1156/problem/D
tags:dfs and similar ,divide and conquer ,dp ,dsu ,trees
rating:2300
34.
链接: http://codeforces.com/contest/1152/problem/D
tags:dp ,greedy ,trees
rating:2000
35.
链接: http://codeforces.com/contest/1153/problem/D
tags:binary search ,dfs and similar ,dp ,greedy ,trees
rating:1800
36.
链接: http://codeforces.com/contest/1142/problem/B
tags:data structures ,dfs and similar ,dp ,math ,trees
rating:2300
37.
链接: http://codeforces.com/contest/1139/problem/C
tags:dfs and similar ,dsu ,graphs ,math ,trees
rating:1500
38.
链接: http://codeforces.com/contest/1118/problem/F1
tags:dfs and similar ,trees
rating:1800
39.
链接: http://codeforces.com/contest/1101/problem/D
tags:data structures ,dfs and similar ,dp ,number theory ,trees
rating:2000
40.
链接: http://codeforces.com/contest/1099/problem/F
tags:binary search ,data structures ,dfs and similar ,dp ,games ,trees
rating:2300
41.
链接: http://codeforces.com/contest/1098/problem/C
tags:binary search ,constructive algorithms ,dfs and similar ,graphs ,greedy ,trees
rating:2300
42.
链接: http://codeforces.com/contest/1098/problem/A
tags:constructive algorithms ,dfs and similar ,greedy ,trees
rating:1600
43.
链接: http://codeforces.com/contest/1085/problem/D
tags:constructive algorithms ,implementation ,trees
rating:1700
44.
链接: http://codeforces.com/contest/1092/problem/F
tags:dfs and similar ,dp ,trees
rating:2100
45.
链接: http://codeforces.com/contest/1083/problem/A
tags:data structures ,dp ,trees
rating:1800
46.
链接: http://codeforces.com/contest/1056/problem/D
tags:constructive algorithms ,dfs and similar ,dp ,graphs ,greedy ,sortings ,trees
rating:1600
47.
链接: http://codeforces.com/contest/1062/problem/E
tags:binary search ,data structures ,dfs and similar ,greedy ,trees
rating:2300
48.
链接: http://codeforces.com/contest/1076/problem/E
tags:data structures ,trees
rating:1900
49.
链接: http://codeforces.com/contest/1044/problem/B
tags:dfs and similar ,interactive ,trees
rating:1900
50.
链接: http://codeforces.com/contest/1057/problem/A
tags:*special ,dfs and similar ,trees
rating:1700
51.
链接: http://codeforces.com/contest/1060/problem/E
tags:dfs and similar ,dp ,trees
rating:2000
52.
链接: http://codeforces.com/contest/1051/problem/F
tags:graphs ,shortest paths ,trees
rating:2300
53.
链接: http://codeforces.com/contest/1037/problem/D
tags:dfs and similar ,graphs ,shortest paths ,trees
rating:1700
54.
链接: http://codeforces.com/contest/1025/problem/D
tags:brute force ,dp ,math ,number theory ,trees
rating:2000
55.
链接: http://codeforces.com/contest/1010/problem/D
tags:dfs and similar ,graphs ,implementation ,trees
rating:2100
56.
链接: http://codeforces.com/contest/1006/problem/E
tags:dfs and similar ,graphs ,trees
rating:1600
57.
链接: http://codeforces.com/contest/1009/problem/F
tags:data structures ,dsu ,trees
rating:2300
58.
链接: http://codeforces.com/contest/1000/problem/E
tags:dfs and similar ,graphs ,trees
rating:2100
59.
链接: http://codeforces.com/contest/982/problem/D
tags:brute force ,data structures ,dsu ,trees
rating:1900
60.
链接: http://codeforces.com/contest/982/problem/C
tags:dfs and similar ,dp ,graphs ,greedy ,trees
rating:1500
61.
链接: http://codeforces.com/contest/979/problem/D
tags:binary search ,bitmasks ,brute force ,data structures ,dp ,dsu ,greedy ,math ,number theory ,strings ,trees
rating:2200
62.
链接: http://codeforces.com/contest/979/problem/C
tags:dfs and similar ,trees
rating:1600
63.
链接: http://codeforces.com/contest/980/problem/E
tags:data structures ,greedy ,trees
rating:2300
64.
链接: http://codeforces.com/contest/963/problem/B
tags:constructive algorithms ,dfs and similar ,dp ,greedy ,trees
rating:2100
65.
链接: http://codeforces.com/contest/960/problem/E
tags:combinatorics ,dfs and similar ,divide and conquer ,dp ,probabilities ,trees
rating:2200
66.
链接: http://codeforces.com/contest/960/problem/D
tags:brute force ,implementation ,trees
rating:2100
67.
链接: http://codeforces.com/contest/959/problem/C
tags:constructive algorithms ,trees
rating:1500
68.
链接: http://codeforces.com/contest/923/problem/C
tags:data structures ,greedy ,strings ,trees
rating:1900
69.
链接: http://codeforces.com/contest/930/problem/A
tags:dfs and similar ,graphs ,trees
rating:1500
70.
链接: http://codeforces.com/contest/932/problem/D
tags:binary search ,dp ,trees
rating:2200
71.
链接: http://codeforces.com/contest/901/problem/A
tags:constructive algorithms ,trees
rating:1500
72.
链接: http://codeforces.com/contest/893/problem/F
tags:data structures ,trees
rating:2300
73.
链接: http://codeforces.com/contest/894/problem/D
tags:brute force ,data structures ,trees
rating:2300
74.
链接: http://codeforces.com/contest/877/problem/E
tags:bitmasks ,data structures ,trees
rating:2000
75.
链接: http://codeforces.com/contest/855/problem/C
tags:dp ,trees
rating:2000
76.
链接: http://codeforces.com/contest/859/problem/E
tags:combinatorics ,dfs and similar ,dsu ,graphs ,trees
rating:2100
77.
链接: http://codeforces.com/contest/859/problem/D
tags:dp ,probabilities ,trees
rating:2100
78.
链接: http://codeforces.com/contest/842/problem/C
tags:dfs and similar ,graphs ,math ,number theory ,trees
rating:2000
79.
链接: http://codeforces.com/contest/839/problem/C
tags:dfs and similar ,dp ,graphs ,probabilities ,trees
rating:1500
80.
链接: http://codeforces.com/contest/838/problem/B
tags:data structures ,dfs and similar ,trees
rating:2100
81.
链接: http://codeforces.com/contest/832/problem/D
tags:dfs and similar ,graphs ,trees
rating:1900
82.
链接: http://codeforces.com/contest/827/problem/B
tags:constructive algorithms ,greedy ,implementation ,trees
rating:1800
83.
链接: http://codeforces.com/contest/821/problem/C
tags:data structures ,greedy ,trees
rating:1600
84.
链接: http://codeforces.com/contest/817/problem/E
tags:bitmasks ,data structures ,trees
rating:2100
85.
链接: http://codeforces.com/contest/814/problem/D
tags:dfs and similar ,dp ,geometry ,greedy ,trees
rating:2000
86.
链接: http://codeforces.com/contest/812/problem/E
tags:games ,trees
rating:2200
87.
链接: http://codeforces.com/contest/802/problem/K
tags:dp ,trees
rating:2100
88.
链接: http://codeforces.com/contest/802/problem/J
tags:dfs and similar ,graphs ,trees
rating:1500
89.
链接: http://codeforces.com/contest/796/problem/D
tags:constructive algorithms ,dfs and similar ,dp ,graphs ,shortest paths ,trees
rating:2100
90.
链接: http://codeforces.com/contest/796/problem/C
tags:constructive algorithms ,data structures ,dp ,trees
rating:1900
91.
链接: http://codeforces.com/contest/792/problem/D
tags:bitmasks ,trees
rating:1800
92.
链接: http://codeforces.com/contest/771/problem/C
tags:dfs and similar ,dp ,trees
rating:2100
93.
链接: http://codeforces.com/contest/780/problem/C
tags:dfs and similar ,graphs ,greedy ,trees
rating:1500
94.
链接: http://codeforces.com/contest/767/problem/C
tags:dfs and similar ,graphs ,greedy ,trees
rating:2000
95.
链接: http://codeforces.com/contest/765/problem/E
tags:dfs and similar ,dp ,greedy ,implementation ,trees
rating:2200
96.
链接: http://codeforces.com/contest/766/problem/E
tags:bitmasks ,constructive algorithms ,data structures ,dfs and similar ,dp ,math ,trees
rating:2200
97.
链接: http://codeforces.com/contest/763/problem/A
tags:dfs and similar ,dp ,dsu ,graphs ,implementation ,trees
rating:1600
98.
链接: http://codeforces.com/contest/761/problem/E
tags:constructive algorithms ,dfs and similar ,graphs ,greedy ,trees
rating:2000
99.
链接: http://codeforces.com/contest/746/problem/G
tags:constructive algorithms ,graphs ,trees
rating:2100
100.
链接: http://codeforces.com/contest/743/problem/D
tags:dfs and similar ,dp ,graphs ,trees
rating:1800
101.
链接: http://codeforces.com/contest/739/problem/B
tags:binary search ,data structures ,dfs and similar ,graphs ,trees
rating:2000
102.
链接: http://codeforces.com/contest/734/problem/E
tags:dfs and similar ,dp ,trees
rating:2100
103.
链接: http://codeforces.com/contest/722/problem/D
tags:binary search ,data structures ,dfs and similar ,greedy ,strings ,trees
rating:1900
104.
链接: http://codeforces.com/contest/706/problem/D
tags:binary search ,bitmasks ,data structures ,trees
rating:1800
105.
链接: http://codeforces.com/contest/700/problem/B
tags:dfs and similar ,dp ,graphs ,trees
rating:2100
106.
链接: http://codeforces.com/contest/698/problem/B
tags:constructive algorithms ,dfs and similar ,dsu ,graphs ,trees
rating:1700
107.
链接: http://codeforces.com/contest/696/problem/B
tags:dfs and similar ,math ,probabilities ,trees
rating:1800
108.
链接: http://codeforces.com/contest/696/problem/A
tags:brute force ,data structures ,implementation ,trees
rating:1500
109.
链接: http://codeforces.com/contest/690/problem/C3
tags:trees
rating:2200
110.
链接: http://codeforces.com/contest/690/problem/C2
tags:dfs and similar ,graphs ,trees
rating:1600
111.
链接: http://codeforces.com/contest/685/problem/B
tags:data structures ,dfs and similar ,dp ,trees
rating:2000
112.
链接: http://codeforces.com/contest/682/problem/C
tags:dfs and similar ,dp ,graphs ,trees
rating:1700
113.
链接: http://codeforces.com/contest/681/problem/D
tags:constructive algorithms ,dfs and similar ,graphs ,trees
rating:2100
114.
链接: http://codeforces.com/contest/675/problem/D
tags:data structures ,trees
rating:1800
115.
链接: http://codeforces.com/contest/639/problem/B
tags:constructive algorithms ,graphs ,trees
rating:1600
116.
链接: http://codeforces.com/contest/652/problem/E
tags:dfs and similar ,dsu ,graphs ,trees
rating:2300
117.
链接: http://codeforces.com/contest/638/problem/C
tags:*special ,dfs and similar ,graphs ,greedy ,trees
rating:2100
118.
链接: http://codeforces.com/contest/622/problem/E
tags:dfs and similar ,greedy ,sortings ,trees
rating:2300
119.
链接: http://codeforces.com/contest/618/problem/D
tags:dfs and similar ,dp ,graph matchings ,greedy ,trees
rating:2200
120.
链接: http://codeforces.com/contest/620/problem/E
tags:bitmasks ,data structures ,trees
rating:2100
121.
链接: http://codeforces.com/contest/615/problem/C
tags:dp ,greedy ,strings ,trees
rating:1900
122.
链接: http://codeforces.com/contest/609/problem/E
tags:data structures ,dfs and similar ,dsu ,graphs ,trees
rating:2100
123.
链接: http://codeforces.com/contest/600/problem/E
tags:data structures ,dfs and similar ,dsu ,trees
rating:2300
124.
链接: http://codeforces.com/contest/599/problem/E
tags:bitmasks ,dp ,trees
rating:2100
125.
链接: http://codeforces.com/contest/593/problem/D
tags:data structures ,dfs and similar ,graphs ,math ,trees
rating:2300
126.
链接: http://codeforces.com/contest/592/problem/D
tags:dfs and similar ,dp ,graphs ,trees
rating:2200
127.
链接: http://codeforces.com/contest/587/problem/C
tags:data structures ,trees
rating:2200
128.
链接: http://codeforces.com/contest/580/problem/C
tags:dfs and similar ,graphs ,trees
rating:1500
129.
链接: http://codeforces.com/contest/576/problem/B
tags:constructive algorithms ,dfs and similar ,greedy ,trees
rating:2300
130.
链接: http://codeforces.com/contest/575/problem/B
tags:dfs and similar ,graphs ,trees
rating:2300
131.
链接: http://codeforces.com/contest/566/problem/A
tags:dfs and similar ,strings ,trees
rating:2300
132.
链接: http://codeforces.com/contest/543/problem/D
tags:dp ,trees
rating:2300
133.
链接: http://codeforces.com/contest/538/problem/E
tags:dfs and similar ,dp ,math ,trees
rating:2200
134.
链接: http://codeforces.com/contest/533/problem/B
tags:dfs and similar ,dp ,graphs ,strings ,trees
rating:2000
135.
链接: http://codeforces.com/contest/522/problem/A
tags:*special ,dfs and similar ,dp ,graphs ,trees
rating:1700
136.
链接: http://codeforces.com/contest/519/problem/E
tags:binary search ,data structures ,dfs and similar ,dp ,trees
rating:2300
137.
链接: http://codeforces.com/contest/507/problem/C
tags:implementation ,math ,trees
rating:1700
138.
链接: http://codeforces.com/contest/501/problem/C
tags:constructive algorithms ,data structures ,greedy ,sortings ,trees
rating:1700
139.
链接: http://codeforces.com/contest/500/problem/D
tags:combinatorics ,dfs and similar ,graphs ,trees
rating:1900
140.
链接: http://codeforces.com/contest/486/problem/D
tags:dfs and similar ,dp ,math ,trees
rating:2300
141.
链接: http://codeforces.com/contest/482/problem/B
tags:constructive algorithms ,data structures ,trees
rating:2000
142.
链接: http://codeforces.com/contest/474/problem/E
tags:binary search ,data structures ,dp ,sortings ,trees
rating:2200
143.
链接: http://codeforces.com/contest/472/problem/D
tags:dfs and similar ,dsu ,shortest paths ,trees
rating:1900
144.
链接: http://codeforces.com/contest/461/problem/B
tags:dfs and similar ,dp ,trees
rating:2200
145.
链接: http://codeforces.com/contest/455/problem/C
tags:dfs and similar ,dp ,dsu ,ternary search ,trees
rating:2200
146.
链接: http://codeforces.com/contest/455/problem/B
tags:dfs and similar ,dp ,games ,implementation ,strings ,trees
rating:2100
147.
链接: http://codeforces.com/contest/452/problem/B
tags:brute force ,constructive algorithms ,geometry ,trees
rating:1800
148.
链接: http://codeforces.com/contest/436/problem/C
tags:dsu ,graphs ,greedy ,trees
rating:1800
149.
链接: http://codeforces.com/contest/431/problem/C
tags:dp ,implementation ,trees
rating:1600
150.
链接: http://codeforces.com/contest/429/problem/A
tags:dfs and similar ,trees
rating:1500
151.
链接: http://codeforces.com/contest/414/problem/D
tags:binary search ,data structures ,greedy ,trees ,two pointers
rating:2300
152.
链接: http://codeforces.com/contest/406/problem/D
tags:dfs and similar ,geometry ,trees
rating:2200
153.
链接: http://codeforces.com/contest/396/problem/C
tags:data structures ,graphs ,trees
rating:None
154.
链接: http://codeforces.com/contest/382/problem/D
tags:dfs and similar ,graphs ,implementation ,trees
rating:2300
155.
链接: http://codeforces.com/contest/374/problem/D
tags:binary search ,data structures ,dp ,trees
rating:2300
156.
链接: http://codeforces.com/contest/371/problem/D
tags:data structures ,dsu ,implementation ,trees
rating:1900
157.
链接: http://codeforces.com/contest/369/problem/C
tags:dfs and similar ,graphs ,trees
rating:1700
158.
链接: http://codeforces.com/contest/343/problem/D
tags:data structures ,dfs and similar ,graphs ,trees
rating:2100
159.
链接: http://codeforces.com/contest/342/problem/E
tags:data structures ,divide and conquer ,trees
rating:2200
160.
链接: http://codeforces.com/contest/339/problem/D
tags:data structures ,trees
rating:1700
161.
链接: http://codeforces.com/contest/337/problem/D
tags:dfs and similar ,divide and conquer ,dp ,trees
rating:2100
162.
链接: http://codeforces.com/contest/288/problem/D
tags:combinatorics ,dfs and similar ,trees
rating:2300
163.
链接: http://codeforces.com/contest/290/problem/C
tags:*special ,graph matchings ,implementation ,trees
rating:1800
164.
链接: http://codeforces.com/contest/282/problem/E
tags:bitmasks ,data structures ,trees
rating:2100
165.
链接: http://codeforces.com/contest/276/problem/E
tags:data structures ,graphs ,trees
rating:2300
166.
链接: http://codeforces.com/contest/274/problem/B
tags:dfs and similar ,dp ,greedy ,trees
rating:2000
167.
链接: http://codeforces.com/contest/260/problem/D
tags:constructive algorithms ,dsu ,graphs ,greedy ,trees
rating:2200
168.
链接: http://codeforces.com/contest/238/problem/C
tags:dfs and similar ,dp ,greedy ,trees
rating:2200
169.
链接: http://codeforces.com/contest/237/problem/D
tags:dfs and similar ,graphs ,greedy ,trees
rating:2200
170.
链接: http://codeforces.com/contest/219/problem/D
tags:dfs and similar ,dp ,graphs ,trees
rating:1900
171.
链接: http://codeforces.com/contest/212/problem/E
tags:dfs and similar ,dp ,trees
rating:1800
172.
链接: http://codeforces.com/contest/193/problem/A
tags:constructive algorithms ,graphs ,trees
rating:1700
173.
链接: http://codeforces.com/contest/191/problem/E
tags:binary search ,data structures ,trees
rating:2200
174.
链接: http://codeforces.com/contest/191/problem/C
tags:data structures ,dfs and similar ,trees
rating:2100
175.
链接: http://codeforces.com/contest/165/problem/D
tags:data structures ,dsu ,trees
rating:2200
176.
链接: http://codeforces.com/contest/161/problem/D
tags:dfs and similar ,dp ,trees
rating:1800
177.
链接: http://codeforces.com/contest/120/problem/F
tags:dp ,greedy ,trees
rating:1500
178.
链接: http://codeforces.com/contest/109/problem/C
tags:dp ,dsu ,trees
rating:2000
179.
链接: http://codeforces.com/contest/101/problem/D
tags:dp ,greedy ,probabilities ,sortings ,trees
rating:2300
180.
链接: http://codeforces.com/contest/87/problem/D
tags:dfs and similar ,dp ,dsu ,graphs ,implementation ,sortings ,trees
rating:2300
181.
链接: http://codeforces.com/contest/85/problem/C
tags:binary search ,dfs and similar ,probabilities ,sortings ,trees
rating:2200
182.
链接: http://codeforces.com/contest/77/problem/C
tags:dfs and similar ,dp ,dsu ,greedy ,trees
rating:2300
183.
链接: http://codeforces.com/contest/75/problem/D
tags:data structures ,dp ,greedy ,implementation ,math ,trees
rating:2100
184.
链接: http://codeforces.com/contest/76/problem/A
tags:dsu ,graphs ,sortings ,trees
rating:2300
185.
链接: http://codeforces.com/contest/61/problem/E
tags:data structures ,trees
rating:2100
186.
链接: http://codeforces.com/contest/61/problem/D
tags:dfs and similar ,graphs ,greedy ,shortest paths ,trees
rating:1900
187.
链接: http://codeforces.com/contest/37/problem/C
tags:data structures ,greedy ,trees
rating:1900
188.
链接: http://codeforces.com/contest/29/problem/D
tags:constructive algorithms ,dfs and similar ,trees
rating:1900
189.
链接: http://codeforces.com/contest/25/problem/D
tags:dsu ,graphs ,trees
rating:1900
190.
链接: http://codeforces.com/contest/14/problem/D
tags:dfs and similar ,dp ,graphs ,shortest paths ,trees ,two pointers
rating:2100
191.
链接: http://codeforces.com/contest/6/problem/E
tags:binary search ,data structures ,dsu ,trees ,two pointers
rating:1900
