| Task: | Alitaulukot |
| Sender: | tuomask |
| Submission time: | 2018-01-14 20:02:05 +0200 |
| Language: | C++ |
| Status: | READY |
| Result: | 100 |
| group | verdict | score |
|---|---|---|
| #1 | ACCEPTED | 15 |
| #2 | ACCEPTED | 85 |
| test | verdict | time | group | |
|---|---|---|---|---|
| #1 | ACCEPTED | 0.05 s | 1 | details |
| #2 | ACCEPTED | 0.09 s | 2 | details |
Code
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll n, in, s=0, M = 1000000007;
int main() {
cin >> n;
for (ll i=0; i<n; i++) {
cin >> in;
s = (s + (i + 1) * (n - i) * in) % M;
}
cout << s << "\n";
}