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# Zero matrix | solution of cracking the coding interview

Problem:-

Write an algorithm such that if an element in an MxN matrix is 0 , it's entire row and column are set to 0.

Code:-

#include<stdio.h>
int main()
{
int a,n,m;
printf("Enter no of row and no of column\n");
scanf("%d%d",&n,&m);
printf("Enter the elements of the array\n");
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
scanf("%d",&a[i][j]);
}
int flag=0;
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
if(a[i][j]==0)
{
flag=1;
break;
}
}
}
printf("The Resultant matrix is:-\n");
if(flag==1)
{
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
a[i][j]=0;
printf("%d ",a[i][j]);
}
printf("\n");
}
}
else
{
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
printf("%d ",a[i][j]);
}
printf("\n");
}
}
return 0;
}

Output:-

Enter no of row and no of column
2 2
Enter the elements of the array
1 2
0 1
The Resultant matrix is:-
0 0
0 0

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