oj.uz

답안 #613776

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
613776 2022-07-30T10:44:30 Z yuto1115 Newspapers (CEOI21_newspapers) C++17
0 / 100
 0 ms 212 KB 
#include <bits/stdc++.h>
#define rep(i, n) for(ll i = 0; i < ll(n); ++i)
#define rep2(i, s, n) for(ll i = ll(s); i < ll(n); ++i)
#define rrep(i, n) for(ll i = ll(n) - 1; i >= 0; --i)
#define rrep2(i, n, t) for(ll i = ll(n) - 1; i >= ll(t); --i)
#define pb push_back
#define eb emplace_back
#define all(a) a.begin(), a.end()
#define SZ(a) int(a.size())
using namespace std;
using ll = long long;
using P = pair<int, int>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vp = vector<P>;
using vvp = vector<vp>;
using vb = vector<bool>;
using vvb = vector<vb>;
using vs = vector<string>;
const int inf = 1001001001;
const ll linf = 1001001001001001001;

template<class T>
bool chmin(T &a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}

template<class T>
bool chmax(T &a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr), cout.tie(nullptr);
    int n, m;
    cin >> n >> m;
    vvi G(n);
    rep(i, m) {
        int u, v;
        cin >> u >> v;
        --u, --v;
        G[u].pb(v);
        G[v].pb(u);
    }
    if (m > n - 1) {
        cout << "NO" << endl;
        return 0;
    }
    rep(i, n) rep2(j, i + 1, n) {
            if (SZ(G[i]) >= 3 and SZ(G[j]) >= 3) {
                cout << "NO" << endl;
                return 0;
            }
        }
    cout << "YES" << endl;
}

Subtask #1
0.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 212 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #2
0.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 212 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #3
0.0 / 80.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 0 ms 212 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -