Mai intai trebuie sa te autentifici.
Cod sursa(job #2615016)
Utilizator | Data | 13 mai 2020 14:44:56 | |
---|---|---|---|
Problema | Cautare binara | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 1.39 kb |
#include <fstream>
using namespace std;
ifstream cin("cautbin.in");
ofstream cout("cautbin.out");
const int nmax=1e5;
int n,m;
int nr[nmax+5];
void read()
{
cin>>n;
for(int i=1;i<=n;i++)
cin>>nr[i];
}
int op1(int x)
{
int st=1,dr=n,sol=-1;
while(st<=dr)
{
int mij=(st+dr)/2;
if(nr[mij]==x)
{
sol=mij;
st=mij+1;
}
else if(nr[mij]<x)
st=mij+1;
else
dr=mij-1;
}
return sol;
}
int op2(int x)
{
int st=1,dr=n,sol=1;
while(st<=dr)
{
int mij=(st+dr)/2;
if(nr[mij]<=x)
{
sol=mij;
st=mij+1;
}
else
dr=mij-1;
}
return sol;
}
int op3(int x)
{
int st=1,dr=n,sol=n;
while(st<=dr)
{
int mij=(st+dr)/2;
if(nr[mij]>=x)
{
sol=mij;
dr=mij-1;
}
else
st=mij+1;
}
return sol;
}
void queries()
{
cin>>m;
for(int i=1;i<=m;i++)
{
int op,x;
cin>>op>>x;
if(op==0)
cout<<op1(x)<<"\n";
else if(op==1)
cout<<op2(x)<<"\n";
else
cout<<op3(x)<<"\n";
}
}
int main()
{
read();
queries();
return 0;
}