Cod sursa(job #2034840)

Utilizator Andrei2000Andrei Mihailescu Andrei2000 Data 8 octombrie 2017 15:08:25
Problema Stramosi Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.62 kb
#include <bits/stdc++.h>
#define nmax 250005
using namespace std;

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

int n,m,d[nmax][25],k=0;
bool ok=1;

int main()
{
    int a,b;
    fin>>n>>m;
    for(int i=1;i<=n;++i){
        fin>>a;
        d[i][0]=a;
    }
    while(ok){
        k++;
        ok=0;
        for(int i=1;i<=n;++i)
            ok=d[i][k]=d[d[i][k-1]][k-1];
    }
    for(int i=1;i<=m;++i){
        fin>>a>>b;
        while(b){
            int q=__builtin_ctz(b);
            b-=1<<q;
            a=d[a][q];
        }
        fout<<a<<'\n';
    }
    return 0;
}