Pagini recente » Cod sursa (job #2192828) | Cod sursa (job #1706067) | Cod sursa (job #1012167) | Cod sursa (job #431928) | Cod sursa (job #2433381)
#include <iostream>
#include <fstream>
#include <cmath>
const int MAXN = 25e4 + 5;
const int MAXLOG = log2(MAXN) + 1;
using namespace std;
ifstream in("stramosi.in");
ofstream out("stramosi.out");
int n,m,dp[MAXN][MAXLOG],tata[MAXN];
///dp[i][j] = stramosul 2 ^ j al lui i
int query(int nod,int x){
for(int bit = 0; bit <= MAXLOG; bit++)
if((x & (1 << bit)) > 0)
nod = dp[nod][bit];
return nod;
}
int main()
{
int querys;
in>>n>>querys;
for(int i = 1; i <= n; i++){
in>>tata[i];
dp[i][0] = tata[i];
}
for(int i = 1; i <= n; i++){
for(int j = 1; j < MAXLOG; j++){
dp[i][j] = dp[dp[i][j - 1]][j - 1];
}
}
for(int i = 1; i <= querys; i++){
int nod,plea_stramos;
in>>nod>>plea_stramos;
out<<query(nod,plea_stramos)<<"\n";
}
return 0;
}