Cod sursa(job #2566196)

Utilizator Vladymyr11Pechi Vladimir Stefan Vladymyr11 Data 2 martie 2020 19:26:36
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.69 kb
#include <fstream>

using namespace std;
int t[250005];
int stra[19][250005];
int up(int x, int p)
    {
    for (int i=18;i>=0;i--)
        if (1<<i<=p)
            {
            p-=1<<i;
            x=stra[i][x];
            }
    return x;
    }
int main()
{
    ifstream fin ("stramosi.in");
    ofstream fout ("stramosi.out");
    int n,m,x,p;
    fin>>n>>m;
    for (int i=1;i<=n;i++)
        {
        fin>>t[i];
        stra[0][i]=t[i];
        }
    for (int i=1;i<=18;i++)
        for (int j=1;j<=n;j++)
            stra[i][j]=stra[i-1][stra[i-1][j]];

    for (int i=1;i<=m;i++)
        {
        fin>>x>>p;
        fout<<up(x,p)<<'\n';
        }
    return 0;
}