Pagini recente » Cod sursa (job #456863) | Cod sursa (job #283730) | Cod sursa (job #638211) | Cod sursa (job #141312) | Cod sursa (job #1237776)
#include <cstdio>
#include <ctime>
#include <cstdlib>
#include <algorithm>
using namespace std;
int v[3000010],n,k;
int impartire(int st,int dr)
{
int x=v[st+rand()%(dr-st+1)];
while(1)
{
for(;v[st]<x;st++);
for(;v[dr]>x;dr--);
if(st<dr) swap(v[st],v[dr]);
else return dr;
}
}
int main()
{
freopen("sdo.in", "r", stdin);
freopen("sdo.out", "w", stdout);
scanf("%d%d",&n,&k);
for(int i=1;i<=n;i++) scanf("%d",&v[i]);
srand(time(0));
int st=1,dr=n;
while(st<dr)
{
int x=impartire(st,dr);
if(k<=x) dr=x;
else st=x+1;
}
printf("%d",v[k]);
return 0;
}