struct Solution;
impl Solution {
fn min_falling_path_sum(arr: Vec<Vec<i32>>) -> i32 {
let n = arr.len();
let m = arr[0].len();
let mut dp = vec![vec![0; m]; n + 1];
for i in 0..n {
for j in 0..m {
let mut min = std::i32::MAX;
for k in 0..m {
if k != j {
min = min.min(dp[i][k]);
}
}
dp[i + 1][j] = arr[i][j] + min;
}
}
*dp[n].iter().min().unwrap()
}
}
#[test]
fn test() {
let arr = vec_vec_i32![[1, 2, 3], [4, 5, 6], [7, 8, 9]];
let res = 13;
assert_eq!(Solution::min_falling_path_sum(arr), res);
}