Cod sursa(job #667170)

Utilizator test9cosmin Macovei test9 Data 22 ianuarie 2012 18:05:36
Problema Stramosi Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.91 kb
//#include <fstream>
//#include <algorithm>
#include<stdio.h>
//using namespace std;

int N,M,mat[20][250001];
int X,Y,t=1,d;

inline int caut(int X,int Y)
{
	int p=0;
	while(Y!=0){
		if((Y&1)==1) X=mat[p][X];
		p++; Y>>=1;
	}
	return X;
}

int main()
{
	//ifstream fin("stramosi.in");
	//ofstream fout("stramosi.out");
	
	//fin>>N>>M;
	//for(int i=1;i<=N;++i)
	//{
		//fin>>mat[0][i];
	//}
	freopen("stramosi.in","r",stdin);
	freopen("stramosi.out","w",stdout);
	scanf("%d%d",&N,&M);
	for(int i=1;i<=N;++i)
		scanf("%d",&mat[0][i]);

	while(t<=N){
		t<<=1;d++;
	}
	for(int i=1;i<=d;++i)
	{
		for(int j=1;j<=N;++j)
		{
			mat[i][j]=mat[i-1][mat[i-1][j]];
		}
	}
	
	for(;M>0;--M)
	{
		//fin>>X>>Y;
		scanf("%d%d",&X,&Y);
		int p=0;
	    while(Y!=0){
		if(Y&1) X=mat[p][X];
		++p; Y>>=1;
	}
		//fout<<caut(X,Y)<<'\n';
		printf("%d\n",X);

	}
	
	//fout.close();
	return 0;
}