✅ [2352] hash - bruteforcy

Author: enkr1

2352/my_solution.js

@@ -0,0 +1,42 @@
+/**
+ * @param {number[][]} grid
+ * @return {number}
+ */
+var equalPairs = function (grid) {
+  let rowMap = new Map(), colMap = new Map(), colList = []
+
+  for (let r = 0; r < grid.length; r++) {
+    let key = JSON.stringify(grid[r])
+    rowMap.set(key, (rowMap.get(key) ?? 0) + 1)
+    for (let c = 0; c < grid[r].length; c++) {
+      colList[c] = (colList[c] ?? []).concat(grid[r][c])
+    }
+  }
+
+  for (let i = 0; i < colList.length; i++) {
+    let key = JSON.stringify(colList[i])
+    colMap.set(key, (colMap.get(key) ?? 0) + 1)
+  }
+
+  let pairCount = 0;
+  for (let [key, value] of rowMap) {
+    console.log("key")
+    console.log(key)
+    if (colMap.has(key)) {
+      pairCount += colMap.get(key) * value
+    }
+  }
+
+  console.log(rowMap)
+  console.log(colMap)
+  console.log(colList)
+  return pairCount
+};
+
+let x =
+  equalPairs([[13, 13], [13, 13]])
+  equalPairs([[3, 2, 1], [1, 7, 6], [2, 7, 7]])
+// equalPairs([[3, 1, 2, 2], [1, 4, 4, 5], [2, 4, 2, 2], [2, 4, 2, 2]])
+
+console.log("Res")
+console.log(x)

2352/solution.js

@@ -0,0 +1,29 @@
+/**
+ * @param {number[][]} grid
+ * @return {number}
+ */
+var equalPairs = function (grid) {
+  let rowMap = new Map(), colMap = new Map(), colList = []
+
+  for (let r = 0; r < grid.length; r++) {
+    let key = JSON.stringify(grid[r])
+    rowMap.set(key, (rowMap.get(key) ?? 0) + 1)
+    for (let c = 0; c < grid[r].length; c++) {
+      colList[c] = (colList[c] ?? []).concat(grid[r][c])
+    }
+  }
+
+  for (let i = 0; i < colList.length; i++) {
+    let key = JSON.stringify(colList[i])
+    colMap.set(key, (colMap.get(key) ?? 0) + 1)
+  }
+
+  let pairCount = 0;
+  for (let [key, value] of rowMap) {
+    if (colMap.has(key)) {
+      pairCount += colMap.get(key) * value
+    }
+  }
+
+  return pairCount
+};

README.md

@@ -122,6 +122,7 @@
 - [1971. Find if Path Exists in Graph](./1971/)
 - [2090. K Radius Subarray Averages](./2090/)
 - [2215. Find the Difference of Two Arrays](./2215/)
+- [2352. Equal Row and Column Pairs](./2352/)
 - [2373. Largest Local Values in a Matrix](./2373/)
 - [2448. Minimum Cost to Make Array Equal](./2448/)
 
@@ -171,7 +172,7 @@ Batch create:
 NOTE: JS IS HERE
 -->
 ```ssh
-chapter=1657 && mkdir ./$chapter && touch ./$chapter/my_solution.js && touch ./$chapter/solution.js && alias x="node ./$chapter/my_solution.js"
+chapter=2352 && 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.