| Task: | Alitaulukot |
| Sender: | inkeri |
| Submission time: | 2018-01-14 19:39:32 +0200 |
| Language: | Python3 |
| Status: | READY |
| Result: | 100 |
| group | verdict | score |
|---|---|---|
| #1 | ACCEPTED | 15 |
| #2 | ACCEPTED | 85 |
| test | verdict | time | group | |
|---|---|---|---|---|
| #1 | ACCEPTED | 0.07 s | 1 | details |
| #2 | ACCEPTED | 0.20 s | 2 | details |
Code
pituus = int(input())
jono = [int(luku) for luku in input().split()]
vasemmalla = 0
oikealla = pituus - 1
summa = 0
for luku in jono:
summa += luku * (1 + vasemmalla + oikealla + vasemmalla * oikealla)
vasemmalla += 1
oikealla -= 1
print(summa % (10**9 + 7))