Update 861-score-after-flipping-matrix.js

Author: everthis

861-score-after-flipping-matrix.js

@@ -1,3 +1,24 @@
+/**
+ * @param {number[][]} grid
+ * @return {number}
+ */
+const matrixScore = function(grid) {
+  const m = grid.length, n = grid[0].length
+  let res = 0
+  res += m * (1 << (n - 1))
+  for(let j = 1; j < n; j++) {
+    let same = 0
+    for(let i = 0; i < m; i++) {
+      if(grid[i][0] === grid[i][j]) same++
+    }
+    res += Math.max(same, m - same) * (1 << (n - 1 - j))
+  }
+  
+  return res
+};
+
+// another
+
 /**
  * @param {number[][]} grid
  * @return {number}