题解 | #不同路径的数目(一)# | Rust

struct Solution{

}

impl Solution {
    fn new() -> Self {
        Solution{}
    }

    /**
    * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
    *
    * 
        * @param m int整型 
        * @param n int整型 
        * @return int整型
    */
    pub fn uniquePaths(&self, m: i32, n: i32) -> i32 {
        let mut dp = vec![vec![1 as i32; n as usize]; m as usize];
        for i in 1..m as usize{
            for j in 1..n as usize{
                dp[i][j] = dp[i-1][j] + dp[i][j-1];
            }
        }
        return dp[m as usize -1][n as usize -1];
    }
}