Create 576. Out of Boundary Paths.py

Author: 724thomas

leetcode3/최원준/576. Out of Boundary Paths.py

@@ -0,0 +1,44 @@
+#
+
+'''
+1. 아이디어 :
+-
+
+2. 시간복잡도 :
+    O(maxMove * n * m * 4)
+
+3. 자료구조/알고리즘 :
+dp
+
+'''
+class Solution:
+    def findPaths(self, m: int, n: int, maxMove: int, startRow: int, startColumn: int) -> int:
+        MOD = 1_000_000_009
+        
+        dp = [[0] * n for _ in range(m)]
+        dp[startRow][startColumn] = 1
+
+        ans = 0
+        dir = [0,1],[0,-1],[-1,0],[1,0]
+
+        for _ in range(maxMove):
+            next_dp = [[0] * n for _ in range(m)]
+
+            for row in range(m):
+                for col in range(n):
+                    if dp[row][col] == 0:
+                        continue
+
+                    for dx, dy in dir:
+                        next_row = row + dx
+                        next_col = col + dy
+
+                        if 0<=next_row<m and 0<=next_col<n:
+                            next_dp[next_row][next_col] += dp[row][col]
+                            next_dp[next_row][next_col] %= MOD
+                        else:
+                            ans += dp[row][col]
+                            ans %= MOD
+            dp = next_dp
+        
+        return ans