Submission #1605650

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Source Code Expand

#include<bits/stdc++.h>

using namespace std;
#define int long long
#define double long double
#define rep(i, n) for(int i=0;i<(n);++i)
#define INF (1ll<<60)
#define FI first
#define SE second
typedef pair<int, int> pii;
#define l_b lower_bound
#define u_b upper_bound

int N, M;
int cnt[100100];

signed main() {
    cin >> N >> M;
    rep(i, M) {
        int a, b;
        cin >> a >> b;
        --a;
        --b;
        ++cnt[a];
        ++cnt[b];
    }
    rep(i, N) {
        if (cnt[i] % 2 == 1) {
            cout << "NO" << endl;
            return 0;
        }
    }
    cout << "YES" << endl;
}

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