Cod sursa(job #2275694)

Utilizator deiubejanAndrei Bejan deiubejan Data 3 noiembrie 2018 13:46:06
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.75 kb
#include <iostream>
#include <fstream>
using namespace std;

ifstream fin("stramosi.in");
ofstream fout("stramosi.out");
#define cin fin
#define cout fout

int n,m,x,y;
int st[250001][18];

int rez(int x, int y)
{

    while(y)
    {
        int j=1,k=0;
        while(j<=y)
        {
            j*=2;
            k++;
        }
        j/=2;
        k--;
        y-=j;
        x=st[x][k];
    }

    return x;
}

int main()
{
    cin>>n>>m;
    for(int i=1; i<=n; i++)
    {
        cin>>st[i][0];
    }

    for(int i=1; i<=n; i++)
        for(int k=1; k<=17; k++)
            st[i][k]=st[st[i][k-1]][k-1];
    for(int i=1; i<=m; i++)
    {
        cin>>x>>y;
        cout<<rez(x,y)<<"\n";
    }




    return 0;
}