1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
#include <cstdio>
#define SUM(i) (i+1)*(i)/2
using namespace std;

int n,k,x,res=2020;

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