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Cod sursa(job #219386)
/*
* cautbin.cpp
*
* Created on: Nov 6, 2008
* Author: stefan
*/
#include <stdio.h>
#include <iostream>
#include <vector>
using namespace std;
vector<unsigned long int> v;
long int BS0(unsigned long int hi, unsigned long int search)
{
unsigned long int lo = 0, mid;
while (lo <= hi)
{
mid = lo + (hi - lo) / 2;
if (v[mid] < search)
lo = mid + 1;
else
hi = mid - 1;
}
if (v[mid] != search)
return -2;
// while(v[++mid] == search);
return mid-1;
}
unsigned long int BS1(unsigned long int hi, unsigned long int search)
{
unsigned long int lo = 0, mid;
while(lo<=hi)
{
mid = lo + (hi - lo) / 2;
if(v[mid] < search)
lo = mid + 1;
else
hi = mid - 1;
}
if (v[mid] != search)
return mid-1;
return mid;
}
unsigned long int BS2(unsigned long int hi, unsigned long int search)
{
unsigned long int lo = 0, mid;
while(lo<=hi)
{
mid = lo + (hi - lo) / 2;
if(v[mid] < search)
lo = mid + 1;
else
hi = mid - 1;
}
return mid;
}
int main()
{
unsigned long int m, n, i, j;
freopen("cautbin.in", "r", stdin);
freopen("cautbin.out", "w", stdout);
scanf("%lu", &n);
v.resize(n+1);
for (i = 0; i < n; ++i)
cin >> v[i];
scanf("%lu", &m);
while (m--)
{
scanf("%lu %lu", &i, &j);
switch (i)
{
case 0:
printf("%ld\n", BS0(n-1, j)+1);
break;
case 1:
printf("%lu\n", BS1(n-1, j)+1);
break;
case 2:
printf("%lu\n", BS2(n-1, j)+1);
break;
}
}
return 0;
}