Nami and the Golden Bell

Nami hears of the Golden Bell, one of the most coveted pieces of treasure and immediately wants to get her hands on it anyhow. She knows she can find it somewhere in the Skypiea island, but in order to get to the treasure she needs to first solve a task: She is given an integer **n**, and she has to find the smallest integer **m** such that the sum of first **m** **odd numbers** is **greater than