| Task: | Alitaulukot |
| Sender: | ArktinenKarpalo |
| Submission time: | 2018-01-14 19:17:52 +0200 |
| Language: | C++ |
| Status: | READY |
| Result: | 0 |
| group | verdict | score |
|---|---|---|
| #1 | WRONG ANSWER | 0 |
| #2 | WRONG ANSWER | 0 |
| test | verdict | time | group | |
|---|---|---|---|---|
| #1 | WRONG ANSWER | 0.04 s | 1 | details |
| #2 | WRONG ANSWER | 0.06 s | 2 | details |
Compiler report
input/code.cpp: In function 'int main()':
input/code.cpp:21:5: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses]
if(n%2!=0&&i+1!=n)
^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=0; i<n; i++) {
cin >> f;
ans += (f*ff)%M;
ans = ans%M;
if(n%2!=0&&i+1!=n)
if(i<n/2)
ff++;
else
ff--;
}
cout << ans;
}