feat: 2025-10-31打卡

2025-10-31 10:00:38 +08:00
parent 71664a10cc
commit 5a9ae36d6b
4 changed files with 124 additions and 21 deletions
--- a/63.unique-paths-ii.java
+++ b/63.unique-paths-ii.java
@@ -0,0 +1,34 @@
+/*
+ * @lc app=leetcode id=63 lang=java
+ *
+ * [63] Unique Paths II
+ */
+
+// @lc code=start
+class Solution {
+    public int uniquePathsWithObstacles(int[][] obstacleGrid) {
+        int[][] dp = new int[obstacleGrid.length][obstacleGrid[0].length];
+        for(int i=0;i<dp.length;i++) {
+            for(int j=0;j<dp[0].length;j++) {
+                dp[i][j] = 0;
+            }
+        }
+        dp[0][0] = obstacleGrid[0][0]==1?0:1;
+        for(int i = 0; i<dp.length; i++) {
+            for(int j=0; j<dp[0].length; j++) {
+                if(obstacleGrid[i][j] == 1) {
+                    continue;
+                }
+                if(i-1>=0) {
+                    dp[i][j] += dp[i-1][j];
+                }
+                if(j-1>=0) {
+                    dp[i][j] += dp[i][j-1];
+                }
+            }
+        }
+        return dp[dp.length-1][dp[0].length-1];
+    }
+}
+// @lc code=end
+