Cod sursa(job #3273127)

Utilizator tudoor_balasescuBalasescu Tudor tudoor_balasescu Data 1 februarie 2025 10:21:13
Problema Stramosi Scor 0
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.7 kb
#include <fstream>

using namespace std;
ifstream fin("stramosi.in");
ofstream fout("stramosi.out");
int n,m,q,p,putere,pow[250005],rmq[21][250005];
int main()
{
    fin>>n>>m;
    for(int i=1; i<=n; i++)
        fin>>rmq[0][i];
    ///rmq[i][j] retine al i-lea stramos a lui j
    for(int i=1; (1<<i)<=n; i++)
        for(int j=1; j<=n; j++)
            rmq[i][j]=rmq[i-1][rmq[i-1][j]]; ///rmq[j-1][i]=poz stramasoului
    for(int i=2; i<=250000; i++)
        pow[i]=pow[i/2]+1;
    for(int i=1; i<=m; i++)
    {
        fin>>q>>p;
        while(p)
        {
            putere=pow[p];
            p-=(1<<putere);
        }
        fout<<rmq[putere][q]<<'\n';
    }
    return 0;
}