Cod sursa(job #872406)

Utilizator superman_01Avramescu Cristian superman_01 Data 6 februarie 2013 00:43:10
Problema Stramosi Scor 30
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.69 kb
#include<cstdio>

#define NMAX 250001

FILE *f=fopen("stramosi.in","r");
FILE *g=fopen("stramosi.out","w");

using namespace std;

int v[20][NMAX];
int n,m;

inline int query( int q, int w)
{
	
	int i;
   
	while(w)
	{
	
		for(  i=1 ;  1<<i <= w ; ++i ) ;
		 
		i--;
				   
		w-=1<<i;
		q=v[i][q];
   }
	
	
	return q;
	
	
}

int main( void )
{
	fscanf(f,"%d%d",&n,&m);
	int copy_m=m;
	int i,j;
	for(i=1;i<=n;i++)
		fscanf(f,"%d",&v[0][i]);
	
	for(i=1;i<=20;i++)
		for(j=1;j<=n;j++)
			v[i][j]=v[i-1][v[i-1][j]];
		
		int q,w;
		m=copy_m;
	while(m)
	{
		
		fscanf(f,"%d%d",&q,&w);
		fprintf(g,"%d\n",query(q,w));
		m--;
		
	}
	
	
	return 0;
	
}