Cod sursa(job #1778269)

Utilizator nnnmmmcioltan alex nnnmmm Data 13 octombrie 2016 17:40:49
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.73 kb
#include<cstdio>

///str[i][j]=al 2^i-lea stramos al lui j
///str[i][j]=str[i-1][str[i-1][j]]

const int PMAX=18,NMAX=250001;

int str[PMAX][NMAX];

int main()
{
 FILE *in=fopen("stramosi.in","r");
 FILE *out=fopen("stramosi.out","w");
 int n,m;
 fscanf(in,"%d %d ",&n,&m);
 for(int i=1;i<=n;i++)
     fscanf(in,"%d ",&str[0][i]);

for(int i=1;i<PMAX;i++)
    for(int j=1;j<=n;j++)
        {
         str[i][j]=str[i-1][str[i-1][j]];
        }

 for(int sq=1;sq<=m;sq++)
     {
      int a,b;
      fscanf(in,"%d %d ",&b,&a);
      int rasp=b;
      for(int i = 1, j = 0; i <= a; i *= 2, j++)
        if(a & i)
            rasp = str[j][rasp];
      fprintf(out,"%d\n",rasp);
     }
 fclose(in);
 fclose(out);
}