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setmatrixzero.cpp
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#include<bits/stdc++.h>
using namespace std;
void setZeros(vector<vector<int>> &matrix)
{
// Write your code here.
bool col = false, row = false;
int n = matrix.size(), m = matrix[0].size();
for(int i = 0 ; i < n ; i++)
{
for(int j = 0 ; j < m ; j++)
{
if(matrix[i][j] == 0)
{
if(j == 0) col = true;
if(i == 0) row = true;
matrix[0][j] = 0;
matrix[i][0] = 0;
}
}
}
for(int i = 1 ; i < n ; i++)
{
for(int j = 1 ; j < m ; j++)
{
if(matrix[i][0] == 0 || matrix[0][j] == 0) matrix[i][j] = 0;
}
}
if(col){
for(int i = 0 ; i < n ; i++) matrix[i][0] = 0;
}
if(row){
for(int i = 0 ; i < m ; i++) matrix[0][i] = 0;
}
}