P5722 [Deep Basics 4. Example 11] Sum of a Sequence

Compute the value of $1+2+3+\cdots+(n-1)+n$, where the positive integer $n$ is no more than 100. Since you are not as smart as Gauss, you are not allowed to use the arithmetic sequence sum formula to get the answer directly.

Input a positive integer $n$.

Output a positive integer representing the final sum.

Constraints: $1 \leq n \leq 100$. Translated by ChatGPT 5