include [HTML_REMOVED]
using namespace std;
const int N = 100010;
int n,k;
int q[N];
int quick_sort(int l, int r, int k)
{
if(l == r) return q[l];
int x = q[l], i = l - 1, j = r + 1;
while(i < j){
while(q[ ++ i] < x);
while(q[ -- j] > x);
if(i < j) swap(q[i],q[j]);
}
int sl = j - l + 1;
if(k <= sl ) return quick_sort(l, j, k);
else return quick_sort(j + 1, r, k - sl);
}
int main()
{
cin >>n >> k;
for(int i = 0; i < n; i ++ ) cin >> q[i];
cout<<quick_sort(0, n - 1, k)<<endl;
return 0;
}
```
忘了加三个点了兄弟,排版有问题