Submission #1687404

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Source Code Expand

#include <bits/stdc++.h>
#define REP(i,n) for(int i=0;i<(int)(n);i++)
#define ALL(x) (x).begin(),(x).end()
#define LL long long
#define pii pair<int,int>
#define pll pair<LL,LL>

using namespace std;

int main(){

    int N;cin>>N;
    cout<<(1+N)*10000/2<<endl;

    return 0;
}

Submission Info

Judge Result