Cod sursa(job #992960)

Utilizator meehighStancu Mihai meehigh Data 2 septembrie 2013 21:44:10
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.65 kb
#define _CRT_SECURE_NO_DEPRECATE
#include <fstream>

#define MAXN 250001
#define MAXLOGN 18

int a[MAXLOGN][MAXN];

int main(){

	FILE *fin, *fout;   
    fin = fopen("stramosi.in", "r");
    fout = fopen("stramosi.out", "w");

	int n,m;
	fscanf(fin, "%d %d", &n, &m);

	int p,q;

	for (int i=1;i<=n;i++){
		fscanf(fin, "%d", &a[0][i]);
	}

	for (int i=1;i<MAXLOGN;i++)
		for (int j=1;j<=n;j++)
			a[i][j] = a[i-1][a[i-1][j]];

	for (int i=0;i<m;i++){
		fscanf(fin, "%d %d", &q, &p);

		for (int k=17;k>=0 && q>0;k--)
			if (p & (1<<k)) 
				q = a[k][q];

		fprintf(fout,"%d\n", q);
	}

	fclose(fin);
	fclose(fout);

	return 0;
}