Cod sursa(job #1770280)
Utilizator | Data | 3 octombrie 2016 23:06:30 | |
---|---|---|---|
Problema | Cautare binara | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 1.89 kb |
#include <fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int m,n,i,j,dr,st,mij,a[100002],k,k1,k2,mix;
int main()
{
fin>>n;
for(i=1;i<=n;i++)
{
fin>>a[i];
}
fin>>m;
for(i=1;i<=m;i++)
{
fin>>k1>>k2;
st=1;
dr=n;
k=0;
if(k1==0)
{
while(st<=dr)
{
mij=(st+dr)/2;
if(a[mij]==k2)
{
if(k<mij)
k=mij;
st=mij+1;
}
else
{
if(a[mij]<k2)
{
st=mij+1;
}
else
dr=mij-1;
}
}
if(k!=0)
fout<<k<<"\n";
else
fout<<-1;
}
if(k1==1)
{ k=0;
while(st<=dr)
{
mij=(st+dr)/2;
if(a[mij]<=k2)
{
if(k<mij)
k=mij;
st=mij+1;
}
else
dr=mij-1;
}
fout<<k<<"\n";
}
if(k1==2)
{
k=1000000000;
while(st<=dr)
{
mij=(st+dr)/2;
if(a[mij]>=k2)
{
if(k>mij)
k=mij;
dr=mij-1;
}
else
st=mij+1;
}
fout<<k;
}
}
return 0;
}