baoshuo/OI-codes
baoshuo/OI-codes
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B - Star or Not

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https://atcoder.jp/contests/abc225/submissions/26898727
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Baoshuo Ren 2021-10-30 20:12:18 +08:00 committed by Baoshuo Ren
parent 2250e77034
commit 7896bca156
Signed by: baoshuo
GPG Key ID: 70F90A673FB1AB68
1 changed files with 23 additions and 0 deletions
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AtCoder/ABC225/B/B.cpp Normal file
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#include <bits/stdc++.h>
using namespace std;
int n, a, b;
vector<int> g[100005];
int main() {
cin >> n;
for (int i = 1; i < n; i++) {
cin >> a >> b;
g[a].push_back(b);
g[b].push_back(a);
}
for (int i = 1; i <= n; i++) {
if (g[i].size() == n - 1) {
cout << "Yes" << endl;
exit(0);
}
}
cout << "No" << endl;
return 0;
}