Cod sursa(job #3245648)
| Utilizator | Data | 29 septembrie 2024 20:44:06 | |
|---|---|---|---|
| Problema | Stramosi | Scor | 100 |
| Compilator | cpp-64 | Status | done |
| Runda | Arhiva de probleme | Marime | 0.89 kb |
#include <fstream>
#include <algorithm>
using namespace std;
ifstream cin("stramosi.in");
ofstream cout("stramosi.out");
int v[100][250005];
int n;
int main()
{
int q;
cin>>n>>q;
for(int i=1;i<=n;i++)
{
cin>>v[0][i];
}
for(int i=1;i<=30;i++)
{
for(int k=1;k<=n;k++)
{
v[i][k]=v[i-1][v[i-1][k]];
}
}
for(int i=1;i<=q;i++)
{
int a,b;
cin>>a>>b;
int ans=0;
int x,y;
int cnt=21;
for(int pas=(1<<20);pas>0;pas/=2)
{
cnt--;
if(pas+ans<=b )
{
a=v[cnt][a];
ans+=pas;
if(a==0)
{
break;
}
}
}
cout<<a<<'\n';
}
return 0;
}
