Pagini recente » Cod sursa (job #2737437) | Cod sursa (job #1401839) | Cod sursa (job #907506) | Cod sursa (job #2248168) | Cod sursa (job #1049051)
//
// main.cpp
// stramosi
//
// Created by Catalina Brinza on 11/26/13.
// Copyright (c) 2013 Catalina Brinza. All rights reserved.
//
#include <fstream>
#include <vector>
#include <math.h>
#define MAX_N 25000
using namespace std;
ifstream f("stramosi.in");
ofstream g("stramosi.out");
int main()
{int n,m,i,x,l,q,p;
vector<int> a[MAX_N];
bool viz[MAX_N];
f>>n>>m;
for (i=1;i<=n;++i)
{
f>>x;
a[i].push_back(x);
viz[i]=false;
if (x==0) viz[i]=true;
}
bool ok=true;l=1;
while (ok)
{
i=1;
ok=false;
while (i<=n)
{
if (!viz[i])
{
ok=true;
if (a[a[i][l-1]].size()>=l) a[i].push_back(a[a[i][l-1]][l-1]);
else a[i].push_back(-1);
if (a[i][l]==0 || a[i][l]==-1) viz[i]=true;
}
++i;
}
++l;
}
for (i=0;i<m;++i)
{ f>>q>>p;
while (p!=0)
{
l=log2(p);
if (a[q][0]==0)
{
q=0; break;
}
if (a[q].size()>=l) q=a[q][l];
else {q=0; break;}
p-=(1<<l);
}
g<<q<<"\n";
}
return 0;
}