Cod sursa(job #2977219)

Utilizator LXGALXGA a LXGA Data 11 februarie 2023 09:36:25
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.52 kb
#include <fstream>
#include <algorithm>
#include <vector>
using namespace std;
ifstream cin("stramosi.in");
ofstream cout("stramosi.out");
int n,m,a,b;
int up[250001][19];
int stramos(int x,int d)
{
	for(int i=18;i>=0;i--)
	{
		if(d&(1<<i))
			x=up[x][i];
	}
	return x;
}
int main()
{
	ios_base::sync_with_stdio(false);
	cin>>n>>m;
	for(int i=1;i<=n;i++)
		cin>>up[i][0];
	for(int j=1;j<=18;j++)
	{
		for(int i=1;i<=n;i++)
			up[i][j]=up[up[i][j-1]][j-1];
	}
	while(m--)
	{
		cin>>a>>b;
		cout<<stramos(a,b)<<'\n';
	}
	return 0;
}