Now you are to find sum of several numbers (more than two). It will be useful to do this in loop. Perhaps "for" loop will do since the amount of values for summation is given.

Input data format is simple:

- first line contains N - amount of values to sum;
- second line contains N values itself.

Example:

```
data:
8
10 20 30 40 5 6 7 8
answer:
126
```

You are to return their sum as an answer.

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