Cod sursa(job #1489631)

Utilizator SilviuIIon Silviu SilviuI Data 21 septembrie 2015 19:28:19
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.51 kb
#include <stdio.h>
#define nmax 250010
using namespace std;
int n,m,x,y,xx,i,j,pred[19][nmax],log2;
int main() {
freopen("stramosi.in","r",stdin);
freopen("stramosi.out","w",stdout);
scanf("%d %d",&n,&m);
for (i=1;i<=n;i++) scanf("%d",&pred[0][i]); log2=0;
for (i=1;(1<<i)<=n;i++) {
    for (j=1;j<=n;j++) pred[i][j]=pred[i-1][pred[i-1][j]]; log2=i;
}
for (i=1;i<=m;i++) {
    scanf("%d %d",&x,&y);
    for (j=0;j<=log2;j++)
        if ((y>>j)&1) x=pred[j][x];
        printf("%d\n",x);
}
return 0;
}