Island Perimeter: AC

sofkyle · sofkyle · commit b20c483cf2d0 · 2019-03-02T23:53:24.000+08:00
diff --git a/LeetCodePrj/Java/leetcode/easy/page3/IslandPerimeter.java b/LeetCodePrj/Java/leetcode/easy/page3/IslandPerimeter.java
@@ -2,12 +2,13 @@
 
 public class IslandPerimeter {
     public int islandPerimeter(int[][] grid) {
-        int len = grid.length;
+        int height = grid.length;
+        int weight = grid[0].length;
 
         int perimeter = 0;
 
-        for (int i = 0; i < len; i++) {
-            for (int j = 0; j < len; j++) {
+        for (int i = 0; i < height; i++) {
+            for (int j = 0; j < weight; j++) {
                 if (grid[i][j] == 1) {
                     if (i - 1 < 0) {
                         perimeter++;
@@ -19,12 +20,12 @@ public int islandPerimeter(int[][] grid) {
                     } else {
                         if (grid[i][j - 1] == 0) perimeter++;
                     }
-                    if (i + 1 >= len) {
+                    if (i + 1 >= height) {
                         perimeter++;
                     } else {
                         if (grid[i + 1][j] == 0) perimeter++;
                     }
-                    if (j + 1 >= len) {
+                    if (j + 1 >= weight) {
                         perimeter++;
                     } else {
                         if (grid[i][j + 1] == 0) perimeter++;
