Cod sursa(job #2283114)

Utilizator TooHappyMarchitan Teodor TooHappy Data 14 noiembrie 2018 23:52:50
Problema Stramosi Scor 80
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.91 kb
#include <bits/stdc++.h>
 
using namespace std;
 
// ifstream in("date.in");
// ofstream out("date.out");

FILE *in = fopen("stramosi.in", "r");
FILE *out = fopen("stramosi.out", "w");

const int Nmax = 250010;

int stramos[Nmax][20];

int main() {
    ios::sync_with_stdio(false);
    // in.tie(0); out.tie(0);

    int n, m; fscanf(in, "%d %d ", &n, &m);

    for(int i = 1; i <= n; ++i) {
        fscanf(in, "%d ", &stramos[i][0]);
    }

    for(int j = 1; j < 20; ++j) {
        for(int i = 1; i <= n; ++i) {
            stramos[i][j] = stramos[stramos[i][j - 1]][j - 1];
        }
    }

    for(int i = 1; i <= m; ++i) {
        int q, p; fscanf(in, "%d %d ", &q, &p);

        for(int i = 0; i < 20; ++i) {
            if((p >> i) % 2 == 1) {
                q = stramos[q][i];
            }
        }
        fprintf(out, "%d\n", q);
    }

    fclose(in); fclose(out);

    // in.close(); out.close();
 
    return 0;
}