Submission #1732471

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Source Code Expand

#include <algorithm>
#include <cstdio>
#include <iostream>
#include <map>
#include <cmath>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include <bitset>
#include <cstring>
#include <deque>
using namespace std;
#define FOR(I,A,B) for(int I = (A); I < (B); ++I)
#define CLR(mat) memset(mat, 0, sizeof(mat))
typedef long long ll;
int main()
{
  ios::sync_with_stdio(false);
  cin.tie(0);
  int N, M; cin >> N >> M;
  int cnt[N+1]; CLR(cnt);
  FOR(i,0,M) {
    int a, b; cin >> a >> b;
    cnt[a]++;
    cnt[b]++;
  }
  FOR(i,1,N+1) {
    if(cnt[i] % 2 == 1) {
      cout << "NO" << endl;
      return 0;
    }
  }
  cout << "YES" << endl;
  return 0;
}

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