public class Solution {
public int islandPerimeter(int[][] grid) {
int i=0,j=0;
int sum=0,reduce=0;
for(i=0;i<grid.length;i++){
for(j=0;j<grid[0].length;j++){
if(grid[i][j]==1){
sum+=4;
if(i<grid.length-1)reduce+=grid[i+1][j]==1?2:0;
if(j<grid[0].length-1)reduce+=grid[i][j+1]==1?2:0;
}
}
}
sum-=reduce;
return sum;
}
}
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文章作者：Tyan博客：noahsnail.com | CSDN | 简书 1. Description 2. S...
本文标题：463. Island Perimeter
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