💀 [59] Word Search

Author: enkr1

79/my_solution.js

@@ -0,0 +1,102 @@
+/**
+ * @param {character[][]} board
+ * @param {string} word
+ * @return {boolean}
+ */
+const exist = (board, word) => {
+  let doesExist = false;
+  // , wordList = word.split("");
+  // console.log(wordList);
+  // wordList.shift()
+  // console.log(wordList);
+
+  const expand = (r, c, visit, wordList) => {
+    console.log(`r:${r}, c:${c}, visit:`)
+    console.log(wordList)
+    console.log(visit)
+    // console.log(i)
+    // console.log(word.length)
+    // console.log(i === word.length)
+
+    if (0 === wordList.length) {
+      console.log(">>>>>>>> >TRUE")
+      doesExist = true;
+    }
+
+    if (
+      r === board.length ||
+      c === board[0].length ||
+      r < 0 ||
+      c < 0 ||
+      1 === visit[r][c]
+    ) {
+      return;
+    }
+
+    if (wordList[0] === board[r][c]) {
+      console.log(`${wordList[0]} vs ${board[r][c]}`)
+      visit[r][c] = 1;
+      wordList.shift();
+
+      expand(r, c + 1, visit, wordList);
+      expand(r + 1, c, visit, wordList);
+      expand(r, c - 1, visit, wordList);
+      expand(r - 1, c, visit, wordList);
+    }
+  }
+
+  // console.log(board)
+  for (let r = 0; r < board.length; r++) {
+    for (let c = 0; c < board[r].length; c++) {
+      if (!doesExist && word[0] === board[r][c]) {
+        console.log(`>>>>> ${word[0]} === ${board[r][c]}`)
+        let visit = Array.from({ length: board.length }, () => Array.from({ length: board[0].length }, () => 0))
+        let wordList = word.split("");
+        expand(r, c, visit, wordList);
+      }
+    }
+  }
+
+  // console.log(board)
+
+  return doesExist;
+};
+
+let x = null;
+// x = exist([["A", "B", "C", "E"], ["S", "F", "C", "S"], ["A", "D", "E", "E"]], "ABCCED")
+
+// x = exist([
+//   ["A", "B", "C", "E"],
+//   ["S", "F", "C", "S"],
+//   ["A", "D", "E", "E"]
+// ], "ABCCED")//true
+
+// x = exist([
+//   ["A", "B", "C", "E"],
+//   ["S", "F", "E", "S"],
+//   ["A", "D", "E", "E"]
+// ], "ABCEFSADEESE") // true
+
+// x = exist(
+//   [
+//     ["A", "B", "C", "E"],
+//     ["S", "F", "C", "S"],
+//     ["A", "D", "E", "E"]
+//   ], "ABCB") // false
+
+x = exist(
+  [
+    ["a", "b"],
+    ["c", "d"]
+  ], "abcd") // false
+
+// x = exist(
+//   [
+//     ["a", "a", "a", "a"],
+//     ["a", "a", "a", "a"],
+//     ["a", "a", "a", "a"]
+//   ], "aaaaaaaaaaab") // false
+
+
+console.log("Result")
+console.log(x)

79/solution.js

@@ -0,0 +1,46 @@
+/**
+ * @param {character[][]} board
+ * @param {string} word
+ * @return {boolean}
+ */
+const exist = (board, word) => {
+  let doesExist = false;
+
+  const expand = (r, c, visit, wordList) => {
+    if (0 === wordList.length) {
+      doesExist = true;
+    }
+
+    if (
+      r === board.length ||
+      c === board[0].length ||
+      r < 0 ||
+      c < 0 ||
+      1 === visit[r][c]
+    ) {
+      return;
+    }
+
+    if (wordList[0] === board[r][c]) {
+      visit[r][c] = 1;
+      wordList.shift();
+
+      expand(r, c + 1, visit, wordList);
+      expand(r + 1, c, visit, wordList);
+      expand(r, c - 1, visit, wordList);
+      expand(r - 1, c, visit, wordList);
+    }
+  }
+
+  for (let r = 0; r < board.length; r++) {
+    for (let c = 0; c < board[r].length; c++) {
+      if (!doesExist && word[0] === board[r][c]) {
+        let visit = Array.from({ length: board.length }, () => Array.from({ length: board[0].length }, () => 0))
+        let wordList = word.split("");
+        expand(r, c, visit, wordList);
+      }
+    }
+  }
+
+  return doesExist;
+};

README.md

@@ -33,6 +33,7 @@
 - [57. Insert Interval](./57/)
 - [73. Set Matrix Zeroes](./73/)
 - [76. Minimum Window Substring](./76/)
+- [79. Word Search](./79/)
 - [83. Remove Duplicates from Sorted List](./83/)
 - [121. Best Time to Buy and Sell Stock](./121/)
 - [128. Longest Consecutive Sequence](./128/)
@@ -119,7 +120,7 @@ Batch create:
 NOTE: JS IS HERE
 -->
 ```ssh
-chapter=2090 && mkdir ./$chapter && touch ./$chapter/my_solution.js && touch ./$chapter/solution.js && alias x="node ./$chapter/my_solution.js"
+chapter=79 && mkdir ./$chapter && touch ./$chapter/my_solution.js && touch ./$chapter/solution.js && alias x="node ./$chapter/my_solution.js"
 ```
 > then you can use `x` for quick debug.