Pagini recente » Cod sursa (job #1372171) | Cod sursa (job #1374736) | Cod sursa (job #43009) | Cod sursa (job #1249049) | Cod sursa (job #657835)
Cod sursa(job #657835)
#include<stdio.h>
#include<cstdlib>
int a[3000005],n,k;
void citire(){
scanf("%d%d",&n,&k);
for(int i=1;i<=n;i++)
scanf("%d",&a[i]);
}
int pivot (int s, int d) {
int i=s-1, j=d-1, piv=a[s+(rand()%(d-s+1))];
while(i<j) {
while(a[i]<piv)
i++;
while(a[j]>piv)
j--;
if(i<j)
a[i]=a[i]^a[j]^(a[j]=a[i]);
else return j;
}
return 0;
}
void quick(int i,int j,int k){
int p=pivot(i-1,j+1);
if(i==j)
return;
else
if(k>p)
quick(p+1,j,k);
else
quick(i,p,k);
}
int main(){
freopen("sdo.in","r",stdin);
freopen("sdo.out","w",stdout);
citire();
quick(1,n,k);
printf("%d",a[k]);
return 0;
}