Cod sursa(job #2105873)
Utilizator | Data | 14 ianuarie 2018 15:00:58 | |
---|---|---|---|
Problema | Cautare binara | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 2.39 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream in("cautbin.in");
ofstream out("cautbin.out");
int n1[100005];
char m1[100005];
int m2[100005];
int main()
{
int n, m, i, st, dr, mi;
in>>n;
for(i=1; i<=n; ++i)
{
in>>n1[i];
}
in>>m;
for(i=1; i<=m; ++i)
{
in>>m1[i];
in>>m2[i];
}
for(i=1; i<=m; ++i)
{
st=1;
dr=n;
if(m1[i]=='0')
{
while(st<dr)
{
mi=st +(dr-st)/2;
if(n1[mi]>m2[i])
{
dr=mi-1;
}
else if(n1[mi]<m2[i])
{
st=mi+1;
}
else
{
st=mi;
while(n1[mi]==n1[st])
{
++st;
}
st=st-1;
dr=st;
}
}
if(n1[st]==m2[i])
{
out<<st;
}
else
{
out<<-1;
}
}
else if(m1[i]=='1')
{
while(st<dr)
{
mi=st+ (dr-st)/2;
if(n1[mi]<m2[i])
{
st=mi+1;
}
else if(n1[mi]>m2[i])
{
dr=mi-1;
}
else
{
st=mi;
while(n1[mi]==n1[st])
{
++st;
}
st=st-1;
dr=st;
}
}
out<<st;
}
else
{
while(st<dr)
{
mi=st+ (dr-st)/2;
if(n1[mi]<m2[i])
{
st=mi+1;
}
else if(n1[mi]>m2[i])
{
dr=mi;
}
else
{
dr=mi;
while(n1[mi]==n1[dr])
{
--dr;
}
dr=dr+1;
st=dr;
}
}
out<<st;
}
out<<"\n";
}
return 0;
}