Submission #546302

#TimeUsernameProblemLanguageResultExecution timeMemory
546302AJ00Calvinball championship (CEOI15_teams)C++14
10 / 100
1 ms212 KiB
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int INF = 1e6+7;
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int t=1,n,a,ans; 
 //   cin >> t; 
    while (t--){
        cin >> n;
        ans = 0;
        for (int i = 0; i < n; i++){
            cin >> a;
            a--;
           // cout << (a*())
            ans = ((ans+(((a)*(n-i))%INF))%INF);
        }
        ans = ((ans+1)%INF);
        cout << ans << "\n";
    }
    return 0;
}
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