There are n cities and n - 1 roads in the Seven Kingdoms, each road connects two cities and we can reach any city from any other by the roads. Theon and Yara Greyjoy are on a horse in the first city, they are starting traveling through the roads. But…
There are n cities and n - 1 roads in the Seven Kingdoms, each road connects two cities and we can reach any city from any other by the roads. Theon and Yara Greyjoy are on a horse in the first city, they are starting traveling through the roads. But…
C. Journey time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output There are n cities and n - 1 roads in the Seven Kingdoms, each road connects two cities and we can reach any city from any other…
Journey CodeForces - 721C Recently Irina arrived to one of the most famous cities of Berland — the Berlatov city. There are n showplaces in the city, numbered from 1 to n, and some of them are connected by one-directional roads. The roads in Berlatov…
Little boy Igor wants to become a traveller. At first, he decided to visit all the cities of his motherland — Uzhlyandia. It is widely known that Uzhlyandia has n cities connected with m bidirectional roads. Also, there are no two roads in the countr…
C. Journey 题目连接: http://codeforces.com/contest/721/problem/C Description Recently Irina arrived to one of the most famous cities of Berland - the Berlatov city. There are n showplaces in the city, numbered from 1 to n, and some of them are connected…
题目链接:http://codeforces.com/problemset/problem/788/B B. Weird journey time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Little boy Igor wants to become a traveller. At first, he decided to vi…
题目链接:http://codeforces.com/contest/721/problem/C C. Journey time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Recently Irina arrived to one of the most famous cities of Berland — the Berlato…
题目链接: C. Journey time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Recently Irina arrived to one of the most famous cities of Berland — the Berlatov city. There are n showplaces in the city,…
D. Weird journey time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Little boy Igor wants to become a traveller. At first, he decided to visit all the cities of his motherland — Uzhlyandia. I…
D. Weird journey time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Little boy Igor wants to become a traveller. At first, he decided to visit all the cities of his motherland — Uzhlyandia. I…
C. Journey time limit per test3 seconds memory limit per test256 megabytes inputstandard input outputstandard output Recently Irina arrived to one of the most famous cities of Berland — the Berlatov city. There are n showplaces to n, and some of them…
time limit per test3 seconds memory limit per test256 megabytes inputstandard input outputstandard output Recently Irina arrived to one of the most famous cities of Berland - the Berlatov city. There are n showplaces in the city, numbered from 1 to n…
Time Limit:2000MS Memory Limit:262144KB 64bit IO Format:%I64d & %I64u Description Little boy Igor wants to become a traveller. At first, he decided to visit all the cities of his motherland - Uzhlyandia. It is widely known that Uzhlyandia has…
考虑这个二元组中有一者是自环,则必然合法. 考虑这两条边都不是自环,如果它们不相邻,则不合法,否则合法. 坑的情况是,如果它是一张完整的图+一些离散的点,则会有解,不要因为图不连通,就误判成无解. #include<cstdio> #include<iostream> using namespace std; typedef long long ll; ll ans; int n,m,zihuan; int v[2000010],next[2000010],first[200001…
