Cod sursa(job #2705719)

Utilizator AlexTacuTacu Alexandru AlexTacu Data 13 februarie 2021 10:37:03
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.72 kb
#include <bits/stdc++.h>

using namespace std;

ifstream in("stramosi.in");
ofstream out("stramosi.out");

int a[20][250005];
int n,m,b,c;

int calc(int x,int y)
{
    for(int i = 0; i <= 18; ++i)
    {
        if(x&(1<<i))
        {
            y = a[i][y];
            x -= (1 << i);
        }
    }
    return y;
}

int cit()
{
    in>>n>>m;
    for(int i=1; i<=n; i++)
        in>>a[0][i];
}

void stramosi()
{
    for(int i=1; i<=18; i++)
        for(int j=1; j<=n; j++)
            a[i][j]=a[i-1][a[i-1][j]];
}

void prg()
{
    for(int i=1; i<=m; i++)
    {
        in>>b>>c;
        out<<calc(c,b)<<'\n';
    }
}

int main()
{
    cit();
    stramosi();
    prg();
    return 0;
}