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Cod sursa(job #639697)
#include<cstdio>
int a[18][250001];
int stram(int x,int lung)
{
int i=0;
while(lung)
{
if(lung%2!=0)
x=a[i][x];
lung/=2;
i++;
}
return x;
}
int main()
{
freopen("stramosi.in","r",stdin);
freopen("stramosi.out","w",stdout);
int m,n,x,lung,i,j;
scanf("%d%d",&n,&m);
for(i=1;i<=n;i++)
scanf("%d",&a[0][i]);
for(i=1;i<=n;i++)
for(j=1;j<=n;j++)
a[i][j]=a[i-1][a[i-1][j]];
for(i=1;i<=m;i++)
{
scanf("%d%d",&x,&lung);
printf("%d\n",stram(x,lung));
}
return 0;
}