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IslandPermimeter.cpp
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<<<<<<< HEAD
class Solution {
static bool issafe(int i,int j,vector<vector<int>>& grid){
int r=grid.size();
int c=grid[0].size();
return(i>=0 && i<r && j>=0 && j<c);
}
public:
int islandPerimeter(vector<vector<int>>& grid) {
int r=grid.size();
int c=grid[0].size();
int ans=0;
for(int i=0;i<r;i++){
for(int j=0;j<c;j++){
if(grid[i][j]==0)
continue;
if(!issafe(i-1,j,grid) || grid[i-1][j]==0)
ans++;
if(!issafe(i,j-1,grid) || grid[i][j-1]==0)
ans++;
if(!issafe(i,j+1,grid) || grid[i][j+1]==0)
ans++;
if(!issafe(i+1,j,grid) || grid[i+1][j]==0)
ans++;
}
}
return ans;
}
=======
class Solution {
static bool issafe(int i,int j,vector<vector<int>>& grid){
int r=grid.size();
int c=grid[0].size();
return(i>=0 && i<r && j>=0 && j<c);
}
public:
int islandPerimeter(vector<vector<int>>& grid) {
int r=grid.size();
int c=grid[0].size();
int ans=0;
for(int i=0;i<r;i++){
for(int j=0;j<c;j++){
if(grid[i][j]==0)
continue;
if(!issafe(i-1,j,grid) || grid[i-1][j]==0)
ans++;
if(!issafe(i,j-1,grid) || grid[i][j-1]==0)
ans++;
if(!issafe(i,j+1,grid) || grid[i][j+1]==0)
ans++;
if(!issafe(i+1,j,grid) || grid[i+1][j]==0)
ans++;
}
}
return ans;
}
>>>>>>> 20843e6664516c6814c0e970cfafb680d978dfd5
};