Cod sursa(job #391127)

Utilizator jeanFMI - Petcu Ion Cristian jean Data 5 februarie 2010 09:36:36
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.53 kb
#include<stdio.h>
#define Nmax 250010

int a[20][Nmax],p,q,i,j,n,m,Lg[Nmax];

int main()
{
	freopen("stramosi.in","r",stdin);
	freopen("stramosi.out","w",stdout);
	
	scanf("%d %d",&n,&m);
	
	for(i=1;i<=n;i++)
		scanf("%d",&a[0][i]);
	
	for(i=2;i<=n;i++)
		Lg[i]=Lg[i>>1]+1;
	
	for(j=1; j <= Lg[n] ; j++)
		for(i=1; i<=n; i++)
			a[j][i]=a[j-1][a[j-1][i]];
		
	for(i=1;i<=m;i++)
	{
		scanf("%d %d",&q,&p);
		
		while(p)
		{
			q=a[Lg[p]][q];
			p-=(1<<Lg[p]);
		}
		
		printf("%d\n",q);
	}
	
	return 0;
}