1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
#include <cstdio>

int main () {
	int n, k, i, j, x;
	int oldest = 10000;
	scanf("%d %d", &n, &k);
	for (i = 1; i <= n; ++i) {
		for (j = 1; j <= i; ++j) {
			scanf("%d", &x);
			if (x > oldest) {
				continue;
			}
			if ((i - j + 1) * j > k) {
				continue;
			}
			oldest = x;
		}
	}
	printf("%d\n", oldest);
	return 0;
}