코드업 1505

#include<stdio.h>
int main() {
	int arr1 = 0, arr2 = -1, n, stop, arr[50][50], sign = 1, a = 1;
	scanf("%d", &n);
	stop = n;
	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < stop; ++j) {
			arr2 += sign;
			arr[arr1][arr2] = a;
			++a;
		}
		stop-=1;
		for (int j = 0; j < stop; ++j) {
			arr1 += sign;
			arr[arr1][arr2] = a;
			++a;
		}
		sign = -sign;
	}
	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < n; ++j) {
			printf("%d ", arr[i][j]);
		}
		printf("\n");
	}
	return 0;
}