Cod sursa(job #1676774)
Utilizator | Data | 6 aprilie 2016 10:05:02 | |
---|---|---|---|
Problema | Cautare binara | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 2.83 kb |
#include <fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int n,indice,i,x,mij,st,dr,ok,okk,v[100010],m,o,mijprec;
int main()
{
f>>n;
for(i=1;i<=n;i++)
{
f>>v[i];
}
f>>m;
for(o=1;o<=m;o++)
{
f>>indice>>x;
mijprec=0;
st=1;dr=n;
ok=1;okk=1;
if(indice==0)
{
while(ok==1)
{
mij=st+(dr-st)/2;
if(x==v[mij])
{
while(v[mij+1]==v[mij])
mij++;
g<<mij<<'\n';break;
}
else
{
if(x<v[mij])
{
dr=mij;
}
else
{
if(x>v[mij])
{
st=mij;
}
}
}
}
}
else
{
if(indice==1)
{
while(ok==1)
{
if(okk==1) mij=st+(dr-st)/2;
if(x>=v[mij]&&okk==1)
{
st=mij;
}
else
{
if(x<v[mij]&&okk==1)
{
dr=mij;
}
}
if(mij==mijprec&&x==v[mij])
{while(v[mij+1]==v[mij]&&okk==1)
mij++;
g<<mij<<'\n';break;}
else
{
if(mijprec==mij&&x!=v[mij])
{
mij--;okk=0;
}
}
mijprec=mij;
}
}
}
if(indice==2)
{
while(ok==1)
{
if(okk==1)mij=st+(dr-st)/2;
if(x>=v[mij]&&okk==1)
{
dr=mij;
}
else
{
if(x<v[mij]&&okk==1)
st=mij;
}
if(mij==mijprec&&x==v[mij])
{while(v[mij-1]==v[mij]&&okk==1)
mij--;
if(x==v[mij])
g<<mij<<'\n';break;}
else if(mij==mijprec&&x!=v[mij]) {mij++;okk=0;}
mijprec=mij;
}
}
}
return 0;
}