Cod sursa(job #2578553)

Utilizator sipdavSipos David Oliver sipdav Data 11 martie 2020 11:33:59
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.58 kb
#include <fstream>

using namespace std;

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

int n,m,s[21][250005];

int rasp(int a,int b)
{
    int node=a;
    for(int i=0; (1<<i)<=b; i++)
        if((1<<i)&b)
            node=s[i][node];
    return node;
}

int main()

{
    in>>n>>m;
    for(int i=1; i<=n; i++)
        in>>s[0][i];
    for(int k=1; k<=20; k++)
        for(int i=1; i<=n; i++)
            s[k][i]=s[k-1][s[k-1][i]];
    for(int i=1,a,b; i<=m; i++)
    {
        in>>a>>b;
        out<<rasp(a,b)<<'\n';
    }
    return 0;

}