1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | #include <algorithm>
#include <cstdio>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define INT(x) int x; scanf("%d", &x)
int main() {
INT(n);
INT(k);
int r = 3000;
REP(i,n) {
REP(j,i+1) {
INT(a);
if ((j + 1) * (i - j + 1) <= k) r = min(r, a);
}
}
printf("%d\n", r);
}
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