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Problem A
Tölvunarfræðingar telja
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Computer scientists count a bit different from normal people. Most people start counting at $1$, then go to $2$, and after that $3$ follows and so forth. But the first number according to computer scientists is $0$. Therefore the second number is $1$ and the $1\, 337$-th number is $1\, 336$.
Input
Input consists of one line with one integer $n$.
Output
Output the $n$-th number, according to computer scientists.
Scoring
|
Group |
Points |
Constraints |
|
1 |
100 |
$1 \leq n \leq 10^9$ |
| Sample Input 1 | Sample Output 1 |
|---|---|
1 |
0 |
| Sample Input 2 | Sample Output 2 |
|---|---|
2 |
1 |
| Sample Input 3 | Sample Output 3 |
|---|---|
1337 |
1336 |
