Cod sursa(job #2699742)
Utilizator | Data | 25 ianuarie 2021 19:08:41 | |
---|---|---|---|
Problema | Cautare binara | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 1.38 kb |
#include <iostream>
#include <fstream>
using namespace std;
int a[100001];
int main()
{
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n, m, x, y, li, lf, mij;
fin>>n;
for(int i=1;i<=n;i++)
fin>>a[i];
fin>>m;
for(int i=1;i<=m;i++)
{
fin>>x>>y;
if(x==0)
{
li=1, lf=n;
mij=(li+lf)/2;
while(li<=lf)
{
if(y>=a[mij])
li=mij+1;
else
lf=mij-1;
mij=(li+lf)/2;
}
if(a[lf]==y)
fout<<lf<<'\n';
else
fout<<-1<<'\n';
}
if(x==1)
{
li=1, lf=n;
mij=(li+lf)/2;
while(li<=lf)
{
if(y>=a[mij])
li=mij+1;
else
lf=mij-1;
mij=(li+lf)/2;
}
fout<<lf<<'\n';
}
if(x==2)
{
li=1,lf=n;
mij=(li+lf)/2;
while(li<=lf)
{
if(y<=a[mij])
lf=mij-1;
else
li=mij+1;
mij=(li+lf)/2;
}
fout<<li<<'\n';
}
}
return 0;
}