Method unique_paths

62. Unique Paths/src/main.rs:8–16

(m: i32, n: i32)

impl Solution {
    pub fn unique_paths(m: i32, n: i32) -> i32 {
        let mut vec = vec![1; n as usize];
        for _ in 0..m as usize - 1 {
            for i in 1..n as usize {
                vec[i] = vec[i] + vec[i-1];
            }
        }
        vec[n as usize - 1]
    }
}

#[cfg(test)]