Task: | Alitaulukot |
Sender: | ArktinenKarpalo |
Submission time: | 2018-01-14 19:48:38 +0200 |
Language: | C++ |
Status: | READY |
Result: | 15 |
group | verdict | score |
---|---|---|
#1 | ACCEPTED | 15 |
#2 | WRONG ANSWER | 0 |
test | verdict | time | group | |
---|---|---|---|---|
#1 | ACCEPTED | 0.04 s | 1 | details |
#2 | WRONG ANSWER | 0.05 s | 2 | details |
Code
#include <bits/stdc++.h> #define ll long long #define ull unsigned long long #define M 1000000007 using namespace std; int 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; }