Cod sursa(job #1469855)

Utilizator theep0Cruceru Radu theep0 Data 9 august 2015 19:15:42
Problema Stramosi Scor 100
Compilator c Status done
Runda Arhiva de probleme Marime 0.83 kb
#include <stdio.h>
#include <stdlib.h>

#define MAXN 250001

int *s[21];

int N, M, P, Q;

int main() {
    int i, j, q, p;
    FILE *fi = freopen("stramosi.in", "r", stdin);
    FILE *fo = freopen("stramosi.out", "w", stdout);
    scanf("%d %d", &N, &M);
    for (i = 0; i <= 20; i++) {
        s[i] = (int*) malloc(sizeof(int) * (N+1));
    }
    for (i = 1; i <= N; i++) {
        scanf("%d", &j);
        s[0][i] = j;
    }
    for (i = 1; i <= 20; i++) {
        for (j = 1; j <= N; j++) {
            s[i][j] = s[i-1][s[i-1][j]];
        }
    }
    for (i = 0; i < M; i++) {
        scanf("%d %d", &q, &p);
        for (j = 20; j >= 0; j--) {
            if ((1 << j) <= p) {
                p -= 1 << j;
                q = s[j][q];
            }
        }
        printf("%d\n", q);
    }
    fclose(fi);
    fclose(fo);
    return 0;
}