aur

#include <fstream>
#include <cmath>
using namespace std;
ifstream fin("aur.in");
ofstream fout("aur.out");

int main()
{
int p;
fin>>p;
if(p==1)
{ int n,nr=0;
char c;
    fin>>n;
    while(fin>>c)
        if(c!=' ') nr++;
    fout<<nr;
}
if(p==2)
{int n,k,nr=0;
char c,a;
    fin>>n>>k;
    while(fin>>c)
    {if(c!=' ') nr++;
    if(nr==k) a=c;
    }
    fout<<a;
}
if(p==3)
{
   unsigned long long n,k,maxx=0,v,y=0,nr=0;
char c;
    fin>>n>>k;
    unsigned long long f1=1;
    for(int i=1;i<k;i++)
    f1=f1*10;

    while(fin>>c)
    {if(c!=' ') {v=(int)c-48;
                 y=y*10+v;}
                 nr++;
               if(nr==k) {if(y>maxx) maxx=y; y=y%f1; nr--;}
    }
 fout<<maxx;
}
    return 0;
}