Submission #1991733

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define rep(i,n)   FOR(i,0,n)
#define pb emplace_back
#define mp make_pair
typedef long long ll;
typedef pair<int,int> pint;

map<int,int> t;
int main(){
    int n,m,ai,bi;
    cin>>n>>m;
    rep(i,m){
        cin>>ai>>bi;
        ++t[ai],++t[bi];
    }
    for(auto it:t){
        if(it.second%2==1){
            cout<<"NO"<<endl;
            return 0;
        }
    }
    cout<<"YES"<<endl;
    return 0;
}

Submission Info

Judge Result