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Cod sursa(job #41231)
// Problema stramosi
#include <stdio.h>
#define MAX 250001
long t[MAX];
long niv[MAX];
int main()
{
freopen( "stramosi.in" ,"rt", stdin );
long n, i, m;
scanf( "%ld %ld", &n, &m );
niv[0] = -1;
for( i=1; i<=n; i++ ) scanf( "%ld", &t[i] );
for( i=1; i<=n; i++ ) niv[i] = niv[t[i]]+1;
freopen( "stramosi.out" ,"wt", stdout );
long p, q;
while(m > 0)
{
m--;
scanf( "%ld %ld", &q, &p );
if( p <= niv[q] )
while( (t[q]) && (p>1) )
{
p--;
q = t[q];
}
if(p) printf("%ld\n", t[q] );
else printf("%ld\n", q );
}
fclose( stdin );
fclose( stdout );
return 0;
}