// 2352. Equal Row and Column Pairs #include /* * 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 }