Cod sursa(job #2055296)

Utilizator luanastLuana Strimbeanu luanast Data 3 noiembrie 2017 00:21:12
Problema Stramosi Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.58 kb
#include <fstream>
#include <cmath>
using namespace std;
ifstream fin ("stramosi.in");
ofstream fout ("stramosi.out");
int n,m,i,k,x,y,D[33][250001];
int main(){
    fin>>n>>m;
    for(i=1;i<=n;i++)
        fin>>D[0][i];

    for(k=1;1<<k<=n;k++)
        for(i=1;i<=n;i++)
            D[k][i]=D[k-1][D[k-1][i]]; //dinamica rmq = al 2^k lea stramos al lui i
    for(i=1;i<=m;i++){
        fin>>x>>y;
        while(y>0){         //cat timp stramosi
            x=D[(int)log2(y)][x];  //mergi prin tati
            y-=1<<(int)log2(y);
        }
        fout<<x<<"\n";
    }
}