### PROBLEM LINK:

**Author:** Anudeep Nekkanti

**Tester:** Mahbubul Hasan

**Editorialist:** Jingbo Shang

### DIFFICULTY:

Cakewalk

### PREREQUISITES:

Basic Programming

### PROBLEM:

There are **N** people in a circle. And a ball is passing clockwise starting from the **a**-th person (index is 1-based). Asking for the index of the person with the ball after **M** passes.

### EXPLANATION:

If the index is 0-based, the answer could be easily get using the mod operations. Therefore, we first transform the number to 0-based, i.e. **a**-th person is **(a-1)** in 0-based.

Then, the answer in 0-based should be **(a-1+M)%N**.

Finally, the answer in 1-based is **(a-1+M)%N+1**.

### AUTHOR’S AND TESTER’S SOLUTIONS:

Solutions will be available soon.

Author’s solution can be found here.

Tester’s solution can be found here.