Task: | Alitaulukot |
Sender: | Olli |
Submission time: | 2018-01-14 19:09:08 +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 | 0.10 s | 2 | details |
Code
#include <iostream> using namespace std; typedef long long ll; const int M = 1e9 + 7; int main() { int n; cin >> n; ll sum = 0; for(int i = 0; i < n; ++i) { ll a; cin >> a; sum += ((ll) (i + 1)*(n - i)*a)%M; sum %= M; } cout << sum << "\n"; }