LeetCode 852. Peak Index in a Mountain Array

Problem Statement

impl Solution {
    pub fn peak_index_in_mountain_array(a: Vec<i32>) -> i32 {
        for i in 0..a.len() - 1 {
            if a[i] < a[i + 1] {
                continue;
            }
            return i as i32;
        }
        return 0;
    }
}