Cod sursa(job #3250061)

Utilizator Alex_DumitrascuAlex Dumitrascu Alex_Dumitrascu Data 19 octombrie 2024 10:05:54
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.84 kb
#include <bits/stdc++.h>

using namespace std;

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

int tata[20][250005];
int logv[250005];

void make_log2()
{
    for (int i=2; i<=250000; i++) {
        logv[i]=logv[i/2]+1;
    }
}

int main()
{
    fin.tie(0); fin.sync_with_stdio(false);
    int n, m; fin>>n>>m;
    for (int i=1; i<=n; i++)  {
        fin>>tata[0][i];
    }
    for (int i=1; i<=18; i++) {
        for (int j=1; j<=n; j++) {
            tata[i][j]=tata[i-1][tata[i-1][j]];
        }
    }
    make_log2();
    //for (int i=1; i<=16; i++) {cout<<i<<' '<<logv[i]<<endl;}
    int q, p, stramos;
    for (int i=1; i<=m; i++) {
        fin>>q>>p;
        stramos=q;
        while (p) {
            int x=logv[p];
            stramos=tata[x][stramos];
            p-=1<<x;
        }
        fout<<stramos<<'\n';
    }
    return 0;
}