Submission #1092451

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define PB push_back
#define CL(A,I) (memset(A,I,sizeof(A)))

#define FOR(i, m, n) for (int i=m; i < n; i++)
#define F(n) FOR(i,0,n)
#define FF(n) FOR(j,0,n)

#define D(X) cout<<"  "<<#X": "<<X<<endl;

using ll=long long;
using ii=pair<ll,ll>;
using vi=vector<ll>;
using vii=vector<ii>;

#define aa first
#define bb second

#define EPS (1e-9)
#define EQ(A,B) (A+EPS>B&&A-EPS<B)

ll arr[100005];
int main() {
	ll N;
	cin>>N;
	ll mod=N*(N+1)/2;
	ll sum=0;
	F(N){
		cin>>arr[i];
		sum+=arr[i];
		sum%=mod;
	}

	if(sum!=0){
		cout<<"NO"<<endl;
	}
	else{
		cout<<"YES"<<endl;
	}

	


    return 0;
}

Submission Info

Judge Result