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Cod sursa(job #355266)
#include<stdio.h>
int t[21][250000],n;
void stra();
int main()
{
freopen("stramosi.in", "rt", stdin);
freopen("stramosi.out", "wt", stdout);
int i,m,p,q,l;
scanf("%d%d", &n, &m);
for(i=1;i<=n;i++)
scanf("%d", &t[0][i]);
stra();
for(i=0;i<m;i++)
{
scanf("%d%d", &q, &p);
l=0;
while(p && q)
{
if(p%2) q=t[l][q];
l++;
p/=2;
}
printf("%d\n", q);
}
return 0;
}
void stra()
{
int i,j;
for(i=1;i<=20;i++)
for(j=1;j<=n;j++)
if(t[i-1][j])
t[i][j]=t[i-1][t[i-1][j]];
else t[i][j]=0;
}