| Task: | Alitaulukot |
| Sender: | ArktinenKarpalo |
| Submission time: | 2018-01-14 19:49:23 +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 | 0.07 s | 2 | details |
Code
#include <bits/stdc++.h>
#define ll long long
#define ull unsigned long long
#define M 1000000007
using namespace std;
ll n, f;
ull ans, ff;
int main() {
cin.tie(0);
cout.tie(0);
ios_base::sync_with_stdio(0);
cin >> n;
ff = n;
for(int i=1; i<=n; i++) {
cin >> f;
ans += (f*(i*(n-i+1))%M)%M;
ans %= M;
}
cout << ans;
}