Cod sursa(job #2353263)
Utilizator | Data | 24 februarie 2019 09:32:36 | |
---|---|---|---|
Problema | Cautare binara | Scor | 0 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 1.85 kb |
#include <bits/stdc++.h>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n,i,j,v[100010],st,dr,val,c,a,b,mij,best;
int main()
{
fin>>n;
for(i=1;i<=n;i++)
fin>>v[i];
fin>>c;
for(i=1;i<=c;i++)
{
fin>>a>>b;
if(a==0)
{
best=-1;
val=b;
st=1;
dr=n;
mij=st+(dr-st)/2;
while(st<=dr)
{
mij=st+(dr-st)/2;
if(v[mij]>val)
dr=mij-1;
if(v[mij]<val)
st=mij+1;
if(val==v[mij])
{
best=mij;
st=mij+1;
}
}
fout<<best<<'\n';
}
else if(a==1)
{
best=-1;
val=b;
st=1;
dr=n;
mij=st+(dr-st)/2;
while(st<=dr)
{
mij=st+(dr-st)/2;
if(v[mij]>val)
dr=mij-1;
else if(v[mij]<val)
st=mij+1;
if(val==v[mij])
{
best=mij;
st=mij+1;
}
}
fout<<best<<'\n';
}
else
{
best=-1;
val=b;
st=1;
dr=n;
while(st<=dr)
{
mij=st+(dr-st)/2;
if(v[mij]>val)
dr=mij-1;
else if(v[mij]<val)
st=mij+1;
if(val==v[mij])
{
best=mij;
dr=mij-1;
}
}
fout<<best<<'\n';
}
}
return 0;
}