제출 #246122

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
246122		VEGAnn	Ronald (COCI17_ronald)	C++14	0 / 120	39 ms	2304 KiB

ronald

#include <bits/stdc++.h>
#define PB push_back
#define sz(x) ((int)x.size())
#define all(x) x.begin(),x.end()
using namespace std;
typedef long long ll;
typedef long double ld;
const int oo = 2e9;
const int N = 1000100;
const int md = 998244353;
const int PW = 233;
const int B = 700;
int n, m, cnt[N];

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

#ifdef _LOCAL
    freopen("in.txt","r",stdin);
#endif // _LOCAl

    cin >> n >> m;

    for (int i = 0; i < m; i++){
        int x, y; cin >> x >> y;
        x--; y--;

        cnt[x]++;
        cnt[y]++;
    }

    for (int i = 0; i < n; i++)
        if (cnt[i] != cnt[0]){
            cout << "NE";
            return 0;
        }

    cout << "DA";

    return 0;
}

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