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Cod sursa(job #499656)
#include<fstream>
using namespace std;
int n,x[100010];
int cb1(int val)
{
int st,p,med,last=-1;
st=1;p=n;
while(st<=p)
{
med=(st+p)/2;
if(val>=x[med])
{
last=med;
st=med+1;
}
else p=med-1;
}
return last;
}
int cb3(int val)
{
int st,p,med,last=-1;
st=1;p=n;
while(st<=p)
{
med=(st+p)/2;
if(val<=x[med])
{
last=med;
p=med-1;
}
else st=med+1;
}
return last;
}
int main()
{
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int m,a,b,i,poz;
f>>n;
for(i=1;i<=n;i++) f>>x[i];
f>>m;
for(i=1;i<=m;i++)
{
f>>a>>b;
poz=cb1(b);
if(a==0)
if (x[poz]==b) g<<poz<<'\n';
else g<<-1<<'\n';
else if(a==1) g<<poz<<'\n';
else g<<cb3(b)<<'\n';
}
f.close();
g.close();
return 0;
}