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// 2352. Equal Row and Column Pairs
#include <stdio.h>
/*
* given a 0-indexed n x n integer matrix 'grid', return the number of pairs
* (ri, cj) such that row 'ri' and column 'ci' are equal. a row and column pair
* is considered equal if they contain the same elements in the same order (ie.
* an equal array)
*/
int equalPairs(int **grid, int grid_size, int *grid_col_size) {
int ans = 0, r_len = grid_size, c_len = *grid_col_size;
for (int i = 0; i < r_len; i++)
for (int j = 0; j < c_len; j++)
if (grid[i][0] == grid[0][j]) {
ans++;
for (int k = 0; k < r_len; k++)
if (grid[i][k] != grid[k][j]) {
ans--;
break;
}
}
return ans;
}
int main() {
int g1[3][3] = {{3, 2, 1}, {1, 7, 6}, {2, 7, 7}}, gs1 = 3, *gcs1;
int g2[4][4] = {{3, 1, 2, 2}, {1, 4, 4, 5}, {2, 4, 2, 2}, {2, 4, 2, 2}},
gs2 = 4, *gcs2;
printf("%d\n", equalPairs(g1, gs1, gcs1)); // expect: 1
printf("%d\n", equalPairs(g2, gs2, gcs2)); // expect: 3
}
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