wrong answer

count-sub-islands.js

@@ -5,34 +5,18 @@
  */
  var countSubIslands = function(grid1, grid2) {
     let answer = 0; 
-    let seen = newBiArray(grid1.length, grid1[0].length);
+
+    var notCovered = function(r, c){
+        if(r < 0 || c < 0 || r == grid1.length || c == grid1[0].length || grid2[r][c] != 1) return 0;
+
+        grid2[r][c] = 2; 
+        return (grid1[r][c] == grid2[r][c] ? 0 : 1) + notCovered(r, c-1) + notCovered(r-1, c) + notCovered(r, c+1) + notCovered(r+1, c);
+    }
+
     for (let i = 0; i < grid1.length; i++) {
         for (let j = 0; j < grid1[0].length; j++) {
-            if(answer, area(i, j, grid1, grid2, seen) > 0) answer++;
+            if(notCovered(i, j) == 0) answer++;
         }
     }    
     return answer;
-};
-
-var newBiArray = function(r, c){
-    var gfg = new Array(r);
-    for (var i = 0; i < gfg.length; i++) {
-        gfg[i] = new Array(c);
-    } 
-    return gfg;
-}
-
-/**
- * @param {number} r
- * @param {number} c
- * @param {number[][]} grid1
- * @param {number[][]} grid2
- * @param {boolean[][]} seen 
- * @return {number}
- */
-var area = function(r, c, grid1, grid2, seen){
-    if(r < 0 || c < 0 || r == grid1.length || c == grid1[0].length || grid2[r][c] == 0 || seen[r][c] || grid1[r][c] == grid2[r][c]) return 0;
-
-    seen[r][c] = true; 
-    return p + area(r, c-1, grid1, grid2, seen) + area(r-1, c, grid1, grid2, seen) + area(r, c+1, grid1, grid2, seen) + area(r+1, c, grid1, grid2, seen);
-}
+};