Cod sursa(job #622800)

Utilizator alex_mircescuAlex Mircescu alex_mircescu Data 18 octombrie 2011 16:45:52
Problema Stramosi Scor 90
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.6 kb
#include <stdio.h>
#include <math.h>

#define X 19

long n, m, v[X][250010];

int main() {
	freopen("stramosi.in", "r", stdin);
	freopen("stramosi.out", "w", stdout);

	scanf("%ld %ld", &n, &m);
	
	for (long i = 1; i <= n; ++i)	scanf("%ld", &v[0][i]);

	for (long i = 1; i < 19; ++i)
		for (long j = 1; j <= n; ++j) {
			v[i][j] = v[i - 1][v[i - 1][j]];
		}
	
	long t, s, Q, P, aux = 1 << 18;
	for (long i = 1; i <= m; ++i)	{
		scanf("%ld %ld", &Q, &P);
		
		t = aux;s = 18;
		
		while (t) {
			if (t & P) {
				Q = v[s][Q];
			}
			
			--s;
			t >>= 1;
		}
		
		printf("%ld\n", Q);
	}

	return 0;
}