Submission #1263495

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Source Code Expand

#include <vector>
#include <iostream>
#include <set>
#include <algorithm>
#include <map>
#include <string>
#include <cmath>
#include <tuple>

using namespace std;
typedef long long ll;
typedef pair<ll,ll> P; 
typedef tuple<ll,ll,ll> T;

int main(){
	ll N,M;
	cin >> N >> M;
	vector<ll> v(N);
	for(int i=0;i<M;i++){
		ll a,b;
		cin >> a >> b;
		v[a-1]++;
		v[b-1]++;
	}
	bool ok=true;
	for(int i=0;i<N;i++){
		if(v[i]%2!=0){
			ok=false;
		}
	}
	if(ok)
		cout << "YES" << endl;
	else
		cout << "NO" << endl;
	return 0;
}

Submission Info

Judge Result