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Cod sursa(job #536519)
// Cautare binara
#include <fstream>
#define NMAX 100010
using namespace std;
int n,x[NMAX];
int caut0(int st, int dr, int key)
{
int mij;
while(st<=dr)
{
mij=(st+dr)/2;
if(x[mij]<=key)
st=mij+1;
else
dr=mij-1;
}
mij=(st+dr)/2;
if(x[mij]>key) mij--;
if(x[mij]==key)
return mij;
return -1;
}
int caut1(int st, int dr, int key)
{
int mij;
while(st<dr)
{
mij=(st+dr)/2;
if(x[mij]<=key)
st=mij+1;
else
dr=mij;
}
mij=(st+dr)/2;
if(x[mij]>key) mij--;
return mij;
}
int caut2(int st, int dr, int key)
{
int mij;
while(st<dr)
{
mij=(st+dr)/2;
if(x[mij]<key)
st=mij+1;
else
dr=mij;
}
mij=(st+dr)/2;
if(x[mij]<key) mij++;
return mij;
}
int main()
{
int i,op,val,m;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
f>>n;
for(i=1;i<=n;i++)
f>>x[i];
f>>m;
for(i=1;i<=m;i++)
{
f>>op>>val;
if(op==0) g<<caut0(1,n,val)<<"\n";
else if(op==1) g<<caut1(1,n,val)<<"\n";
else g<<caut2(1,n,val)<<"\n";
}
return 0;
}