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2D Hopscotch.cpp
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2D Hopscotch.cpp
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class Solution{
public:
int hopscotch(int n, int m, vector<vector<int>> mat, int ty, int i, int j)
{
// code here
int sum=0;
if(ty==0)
{
if(i-1>=0)
sum+=mat[i-1][j];
if(i+1<n)
sum+=mat[i+1][j];
if(j-1>=0)
sum+=mat[i][j-1];
if(j+1<m)
sum+=mat[i][j+1];
if(j%2)
{
if(i+1<n)
{
if(j-1>=0)
sum+=mat[i+1][j-1];
if(j+1<m)
sum+=mat[i+1][j+1];
}
}
else
{
if(i-1>=0)
{
if(j-1>=0)
sum+=mat[i-1][j-1];
if(j+1<m)
sum+=mat[i-1][j+1];
}
}
return sum;
}
else
{
if(i-2>=0)
sum+=mat[i-2][j];
if(i+2<n)
sum+=mat[i+2][j];
if(j-2>=0)
sum+=mat[i][j-2];
if(j+2<m)
sum+=mat[i][j+2];
if(i-1>=0)
{
if(j-2>=0)
sum+=mat[i-1][j-2];
if(j+2<m)
sum+=mat[i-1][j+2];
}
if(i+1<n)
{
if(j-2>=0)
sum+=mat[i+1][j-2];
if(j+2<m)
sum+=mat[i+1][j+2];
}
if(j%2)
{
if(i-1>=0)
{
if(j-1>=0)
sum+=mat[i-1][j-1];
if(j+1<m)
sum+=mat[i-1][j+1];
}
if(i+2<n)
{
if(j-1>=0)
sum+=mat[i+2][j-1];
if(j+1<m)
sum+=mat[i+2][j+1];
}
}
else
{
if(i+1<n)
{
if(j-1>=0)
sum+=mat[i+1][j-1];
if(j+1<m)
sum+=mat[i+1][j+1];
}
if(i-2>=0)
{
if(j-1>=0)
sum+=mat[i-2][j-1];
if(j+1<m)
sum+=mat[i-2][j+1];
}
}
return sum;
}
}
};