Cod sursa(job #2713766)

Utilizator OpreanRobertOprean Robert OpreanRobert Data 28 februarie 2021 16:11:46
Problema Stramosi Scor 90
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.61 kb
#include <bits/stdc++.h>

#define nlim 250005

using namespace std;

ifstream f("stramosi.in");
ofstream g("stramosi.out");

int n, m, q, p, v[nlim][20], l;

int stramos(int x, int y) {
    for (int i = 20; i >= 0; --i)
        if ((1 << i) & y) x = v[x][i];
    return x;
}

int main()
{
    f >> n >> m;
    l = ceil(log2(n));
    for (int i = 1; i <= n; ++i)
        f >> v[i][0];
    for (int j = 1; j <= l; ++j)
        for (int i = 1; i <= n; ++i)
            v[i][j] = v[v[i][j-1]][j-1];
    while (m) {
        --m;
        f >> q >> p;
        g << stramos(q, p) << '\n';
    }
}