1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#include<bits/stdc++.h>
using namespace std;
int n,k,w,a,b;
vector <pair<int,pair<int,int> > > v;
int main()
{
	scanf("%d%d",  &n, &k);
	for(int i=1;i<=n;++i)
	{
		for(int j=1;j<=i;++j)
		{
			scanf("%d", &w);
			v.pb(mp(w,mp(i,j)));
		}
	}
	sort(v.begin(),v.end());
	for(int i=0;i^v.size();++i)
	{
		a=v[i].se.fi;
		b=v[i].se.se;
		w=b*(a-b+1);
		if(w<=k)
		{
			printf("%d\n", v[i].fi);
			return 0;
		}
	}
	return 0;
}
/*

5 7
1999
2019 2010
850 1500 1600
900 900 710 900
1000 800 600 800 1000
*/