Cod sursa(job #227828)

Utilizator hasegandaniHasegan Daniel hasegandani Data 5 decembrie 2008 17:05:00
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 1 kb
#include<stdio.h>
#include <string.h>

#define nmax 1<<18
FILE *f=fopen("stramosi.in","r"),*g=fopen("stramosi.out","w");  
int t[18][nmax];

#define Dim 10000   
#define buff fread(buf,1,Dim,f), poz=0   
int poz;   
char buf[Dim];   
inline int cit()   
{   
       int ret=0;   
       while (buf[poz] < 48) if (++poz == Dim) buff;   
       while (buf[poz] > 47)   
       {   
             ret = ret*10 + buf[poz] - 48;   
             if (++poz == Dim) buff;   
       }          
       return ret;   
}   
  


int main()
{
    buff;
    int n,m;
    n=cit();m=cit();
    for(int i=1;i<=n;++i)
    t[0][i] = cit();
    for (int i=1;(1<<i) <= n;++i)
    for (int j=1;j<=n;++j)
    t[i][j] = t[i-1][t[i-1][j]];
    for (int i=1;i<=m;++i)
    {
        int a,b;
        a=cit();b=cit();
        #define W(i) if ((1<<i)&b) a = t[i][a];
        W(0)W(1)W(2)W(3)W(4)W(5)W(6)W(7)W(8)W(9)W(10)W(11)W(12)W(13)W(14)W(15)W(16)W(17)W(18)
        fprintf(g,"%d\n",a);
    }
    return 0;
}