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Cod sursa(job #368216)
#include <fstream>
#include <iostream>
using namespace std;
int n,a[100001];
inline int BS1(int x)
{
int lo, hi, mid;
for (lo = 1, hi = n; lo <= hi; )
{
mid = lo + (hi-lo) / 2;
if (x < a[mid]) hi = mid-1;
else if (a[mid] < x) lo = mid+1;
else return mid;
}
return -1;
}
inline int BS2(int x)
{
int lo, hi, mid, last = 0;
for (lo = 1, hi = n; lo <= hi; )
{
mid = lo + (hi-lo) / 2;
if (a[mid] <= x) last = mid, lo = mid+1;
else hi = mid-1;
}
return last;
}
inline int BS3(int x)
{
int lo, hi, mid, last = n+1;
for (lo = 1, hi = n; lo <= hi; )
{
mid = lo + (hi-lo) / 2;
if (x <= a[mid]) last = mid, hi = mid-1;
else lo = mid+1;
}
return last;
}
inline int f0(int x){
int st=1,dr=n,rez = -1;
while(st<=dr){
int m = st+(dr-st)/2;
// cout<<m<<" ";
if( a[m] == x)
rez = m;
if(a[m]<x)
st = m+1;
else
dr= m-1;
}
return rez;
}
inline int f1(int x){
int st=1,dr=n,rez;
while(st<=dr){
int m = st+(dr-st)/2;
if(a[m]<=x)
rez = m, st= m+1;
else
dr = m-1;
}
return rez;
}
inline int f2(int x){
int st=1,dr=n, rez;
while(st<=dr){
int m =st+(dr-st)/2;
if(a[m]>=x)
rez = m , dr = m-1;
else
st = m+1;
}
return rez;
}
int main(){
ifstream fin("cautbin.in");
fin>>n;
for(int i=1;i<=n;i++)
fin>>a[i];
int m;
fin>>m;
ofstream fout("cautbin.out");
for( ; m ; --m){
int c,x;
fin>>c>>x;
switch(c){
// case 0:{fout<<f0(x)<<endl;break;}
case 0:{fout<<BS1(x)<<endl;break;}
// case 1:{fout<<f1(x)<<endl;break;}
case 1:{fout<<BS2(x)<<endl;break;}
// case 2:{fout<<f2(x)<<endl;break;}
case 2:{fout<<BS3(x)<<endl;break;}
}
}
fout.close();
return 0;
}