Submission #2840329

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Source Code Expand

#include <iostream>
#include <map>
using namespace std;
typedef long long ll;
ll n, m, a, b, ans;
map<ll, ll> mp;
int main(void){
    // Your code here!
    cin >> n >> m;
    for (ll i = 0; i < m; i++) {
        cin >> a >> b;
        mp[a]++; mp[b]++;
    }
    for (auto itr = mp.begin(); itr != mp.end(); itr++) {
        if (itr->second % 2) ans++;
    }
    if (ans) cout << "NO" << endl;
    else cout << "YES" << endl;
}

Submission Info

Judge Result