Cod sursa(job #2393711)

Utilizator Bulboaca_EugenBulboaca Alexandru Eugen Bulboaca_Eugen Data 31 martie 2019 21:52:48
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.78 kb
#include <bits/stdc++.h>
#define zeros(x)  (x & (-x))
using namespace std;
const int MAXN =  3 * 1e5;
int father[35][MAXN];
int fth(int x, int node){
    for(int i = 0 ; (1 << i) <= x; ++i){
        if(x & (1 << i)) node = father[i][node];
    }
    return node;
}
ifstream fin("stramosi.in");
ofstream fout("stramosi.out");
int main(){
    int n, m;
    fin >> n >> m;
    for(int i = 1; i <= n; ++i){
        int x;
        fin >> x;
        father[0][i] = x;
    }
    for(int node = 1; node <= n; ++node){
        for(int i = 1; i <= 29; ++i){
            father[i][node] = father[i - 1][father[i - 1][node]];
        }
    }
    for(int i = 1; i <= m; ++i){
        int p, q;
        fin >> q >> p;
        fout << fth(p, q) << '\n';
    }
    return 0;
}