Cod sursa(job #2977231)

Utilizator Iordache_CezarIordache Cezar Iordache_Cezar Data 11 februarie 2023 09:46:27
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.78 kb
#include <bits/stdc++.h>
#define NMAX 250008

using namespace std;
ifstream fin ("stramosi.in");
ofstream fout ("stramosi.out");

int n, m, stramos[NMAX][20], nivel[NMAX];
vector <int> G[NMAX];

void DFS(int nod);
int query(int nod, int p);

int main()
{
    int x, y;
    fin >> n >> m;
    for (int i = 1; i <= n; i++)
    {
        fin >> x;
        stramos[i][0] = x;
    }
    for (int j = 1; (1 << j) <= n; 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++)
    {
        fin >> x >> y;
        while (y)
        {
            int lg = int(log2(y));
            x = stramos[x][lg];
            y = y - (1 << lg);
        }
        fout << x << '\n';
    }
    return 0;
}