Cod sursa(job #1262997)

Utilizator alexpetrescuAlexandru Petrescu alexpetrescu Data 13 noiembrie 2014 20:02:20
Problema Stramosi Scor 100
Compilator c Status done
Runda Arhiva de probleme Marime 0.72 kb
#include <stdio.h>
#define MAXN 250000
#define MAXLG 17
int t[MAXLG+1][MAXN+1];
int main(){
    int n, q, i, x, j, log, p;
    FILE *fin, *fout;
    fin=fopen("stramosi.in", "r");
    fout=fopen("stramosi.out", "w");
    fscanf(fin, "%d%d", &n, &q);
    for(i=1; i<=n; i++){
        fscanf(fin, "%d", &t[0][i]);
    }
    for(i=1; (1<<i)<=n; i++){
        for(j=1; j<=n; j++){
            t[i][j]=t[i-1][t[i-1][j]];
        }
    }
    log=i-1;
    for(i=0; i<q; i++){
        fscanf(fin, "%d%d", &x, &p);
        for(j=log; j>=0; j--){
            if((p&(1<<j))!=0){
                x=t[j][x];
            }
        }
        fprintf(fout, "%d\n", x);
    }
    fclose(fin);
    fclose(fout);
    return 0;
}