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Cod sursa(job #667655)
#include <fstream>
#define dim 1000001
using namespace std;
int n,a[dim],m,x,y,i;
int bin_search0(int st,int dr,int x)
{
int mij;
while(st<=dr)
{
mij=(st+dr)/2;
if(a[mij]<=x)
st=mij+1;
else
dr=mij-1;
}
mij=(st+dr)/2;
if(a[mij]>x)
mij--;
if(a[mij]==x)
return mij;
else
return -1;
}
int bin_search1(int st,int dr,int x)
{
int mij;
while(st<dr)
{
mij=(st+dr)/2;
if(a[mij]<=x)
st=mij+1;
else
dr=mij;
}
mij=(st+dr)/2;
if(a[mij]>x)
--mij;
return mij;
}
int bin_search2(int st,int dr,int x)
{
int mij;
while(st<dr)
{
mij=(st+dr)/2;
if(a[mij]>=x)
dr=mij;
else
st=mij+1;
}
mij=(st+dr)/2;
if(a[mij]<x)
++mij;
return mij;
}
int main()
{
ifstream f("cautbin.in");
ofstream g("cautbin.out");
f>>n;
for(i=1;i<=n;++i)
f>>a[i];
f>>m;
for(i=1;i<=m;++i)
{
f>>y>>x;
if(y==0)
g<<bin_search0(1,n,x)<<'\n';
else
if(y==1)
g<<bin_search1(1,n,x)<<'\n';
else
if(y==2)
g<<bin_search2(1,n,x)<<'\n';
}
}