| Task: | Alitaulukot |
| Sender: | Yytsi |
| Submission time: | 2018-01-14 19:35:11 +0200 |
| Language: | C++ |
| Status: | READY |
| Result: | 100 |
| group | verdict | score |
|---|---|---|
| #1 | ACCEPTED | 15 |
| #2 | ACCEPTED | 85 |
| test | verdict | time | group | |
|---|---|---|---|---|
| #1 | ACCEPTED | 0.04 s | 1 | details |
| #2 | ACCEPTED | 0.07 s | 2 | details |
Code
#include <iostream>
using namespace std;
typedef long long ll;
ll n;
int s[100001];
int main(int argc, char** argv) {
ios_base::sync_with_stdio(0); cin.tie(0);
cin >> n; cin.ignore();
for (ll i = 0LL; i < n; i++) {
int e; cin >> e;
s[i] = e;
}
ll r = 0LL;
for (ll i = 0LL; i < n; i++) {
ll c = (ll)s[i];
r += c * (i + 1) * (n - i);
r %= 1000000007LL;
}
cout << r;
return 0;
}