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#include <iostream>
const int MAX_SIZE = 30;
bool hasRepeatedDigits(int n) {
for (int lastDigit = 0; n != 0; n /= 10) {
lastDigit = n % 10;
for (int tmp = n / 10; tmp != 0; tmp /= 10) {
if (tmp % 10 == lastDigit)
return true;
}
}
return false;
}
int getRepeatedLen(int matrix[MAX_SIZE][MAX_SIZE], int n) {
int arrSize = 0;
for (int col = 0, row = n - 1; col < n && row < n; col = (row > 0) ? 0 : col + 1, row = (row > 0) ? row - 1 : 0) {
for (int k = col, l = row; k < n && l < n; k++, l++) {
if (hasRepeatedDigits(matrix[l][k]))
arrSize++;
}
}
return arrSize;
}
int* collect(int matrix[MAX_SIZE][MAX_SIZE], int n) {
int arrSize = getRepeatedLen(matrix, n);
int *arr = new int[arrSize];
for (int col = 0, row = n - 1, arrI = 0; col < n && row < n; col = (row > 0) ? 0 : col + 1, row = (row > 0) ? row - 1 : 0) {
for (int k = col, l = row; k < n && l < n; k++, l++) {
if (hasRepeatedDigits(matrix[l][k]))
arr[arrI++] = matrix[l][k];
}
}
return arr;
}
int main() {
int n;
std::cin >> n;
int matrix[MAX_SIZE][MAX_SIZE];
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++)
std::cin >> matrix[i][j];
}
int *repeated = collect(matrix, n);
int repeatedLen = getRepeatedLen(matrix, n); // По условие няма как иначе да върнем размера
for (int i = 0; i < repeatedLen; i++) {
std::cout << repeated[i] << " ";
}
std::cout << std::endl;
delete[] repeated;
}
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