72. 编辑距离

src/main.rs

@@ -1,22 +1,29 @@
 mod arr;
-
 struct Solution {}
 impl Solution {
-    pub fn max_distance(nums1: Vec<i32>, nums2: Vec<i32>) -> i32 {
-        let mut ans = 0;
-        for i in 0..nums1.len() {
-            let mut idx = nums2.partition_point(|&x| x >= nums1[i]);
-            if idx == 0 {
-                continue;
-            }
-            idx -= 1;
-            ans = ans.max(idx as i32 - i as i32);
+    pub fn min_distance(word1: String, word2: String) -> i32 {
+        let mut dp = vec![vec![0; word2.len() + 1]; word1.len() + 1];
+        let word1 = word1.chars().collect::<Vec<char>>();
+        let word2 = word2.chars().collect::<Vec<char>>();
+        for i in 1..=word1.len() {
+            dp[i][0] = dp[i - 1][0] + 1;
         }
-        ans
+        for i in 1..=word2.len() {
+            dp[0][i] = dp[0][i - 1] + 1;
+        }
+        for i in 0..word1.len() {
+            for j in 0..word2.len() {
+                dp[i + 1][j + 1] = (dp[i][j] + if word1[i] != word2[j] { 1 } else { 0 })
+                    .min(dp[i][j + 1] + 1)
+                    .min(dp[i + 1][j] + 1);
+            }
+        }
+        dp[word1.len()][word2.len()]
     }
 }
-
 fn main() {
-    println!("{:?}", Solution::max_distance(vec![55,30,5,4,2],vec![100,20,10,10,5]));
+    println!(
+        "{:?}",
+        Solution::min_distance("intention".to_string(), "execution".to_string())
+    );
 }
-