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10.SetMatrixToZeros.cpp
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58 lines (48 loc) · 1.2 KB
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#include <bits/stdc++.h>
using namespace std;
void setZeroes(vector<vector<int>>& matrix, int n, int m) {
int col0 = 1;
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
if (matrix[i][j] == 0) {
matrix[i][0] = 0;
if (j > 0) matrix[0][j] = 0;
else col0 = 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 (matrix[0][0] == 0) {
for (int j = 0; j < m; j++)
matrix[0][j] = 0;
}
if (col0 == 0) {
for (int i = 0; i < n; i++)
matrix[i][0] = 0;
}
}
int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int n, m;
cin >> n >> m;
vector<vector<int>> matrix(n, vector<int>(m));
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
cin >> matrix[i][j];
}
}
setZeroes(matrix, n, m);
for (int i = 0; i < n; i++) {
for (int j = 0; j < m; j++) {
cout << matrix[i][j] << ' ';
}
cout << '\n';
}
return 0;
}