zt17 @ 2023-01-30 17:52:33
#include <bits/stdc++.h>
using namespace std;
int a[100001];
void mysort(int left,int right)
{
if(left >= right) return;
int i=left,j=right,flag=a[(left+right)/2],tmp;
do
{
while (a[i] < flag)i++;
while (a[j] > flag)j--;
if(i <= j) tmp=a[i],a[i]=a[j],a[j]=tmp,i++,j--;
} while (i <= j);
if(left < j)mysort(left,j);
if(i < right)mysort(i,right);
}
int main()
{
int n,k;
cin >> n >> k;
for(int i=0;i<n;i++)
cin >> a[i];
mysort(0,n-1);
cout << a[k];
return 0;
}
by Sun_Email @ 2023-01-30 17:56:24
n不止1e5吧
by jiangfeiyang @ 2023-01-30 18:10:16
n我用的是5e6.
但是你这个还要提一下速(用scanf或快读)
by dengsq520 @ 2023-02-12 09:36:26
啊啊啊,我用的特简单,但和你一样,哈哈哈
#include<bits/stdc++.h>
using namespace std;
bool cmp(int i,int j)
{
return i < j;
}
int main()
{
int n, k;
cin >> n >> k;
vector<int> nums;
int num;
for(int i = 0;i < n;i++)
{
cin >> num;
nums.push_back(num);
}
sort(nums.begin(),nums.end(),cmp);
cout << nums[k];
return 0;
}
有没有大佬一起看一下