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Cod sursa(job #38242)
#include<stdio.h>
int a[250001][20],n,i,j,m,q,max,pow[20];
int main()
{freopen("stramosi.in","r",stdin);
freopen("stramosi.out","w",stdout);
scanf("%d %d",&n,&m);
for(q=1;q<=n;q++)
scanf("%d",&a[0][q]);
pow[0]=1;
for(i=1,pow[1]=2;pow[i]<=n;i++,pow[i]=2*pow[i-1])
for(j=1;j<=n;j++)
a[i][j]=a[i-1][a[i-1][j]];
max=i;
for(;m;m--)
{scanf("%d %d",&q,&n);
i=max;
while(q&&n)
{if(pow[i]>n){i--; continue;}
q=a[i][q];
n=n-pow[i];}
printf("%d\n",q);}
fclose(stdout);
return 0;}