Pagini recente » Monitorul de evaluare | Borderou de evaluare (job #2705194) | Cod sursa (job #1937366) | Cod sursa (job #3263145) | Cod sursa (job #3307055)
#include <fstream>
#include <vector>
using namespace std;
int rightmostExactBS(const vector<int>& v, int x)
{
int low = 1;
int high = (int)v.size() - 1;
while (low <= high)
{
int mid = (low + high) / 2;
if (x >= v[mid])
low = mid + 1;
else high = mid - 1;
}
if (v[high] == x)
return high;
return -1;
}
int rightmostLessThanBS(const vector<int>& v, int x)
{
int low = 1;
int high = (int)v.size() - 1;
while (low <= high)
{
int mid = (low + high) / 2;
if (x >= v[mid])
low = mid + 1;
else high = mid - 1;
}
if (v[high] <= x)
return high;
return -1;
}
int leftmostGreaterThanBS(const vector<int>& v, int x)
{
int low = 1;
int high = (int)v.size() - 1;
while (low <= high)
{
int mid = (low + high) / 2;
if (x > v[mid])
low = mid + 1;
else high = mid - 1;
}
if (v[low] >= x)
return low;
return -1;
}
int main()
{
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n, m;
fin >> n;
vector<int>v(n + 1);
for (int i = 1; i <= n; ++i)
fin >> v[i];
fin >> m;
for (int i = 1; i <= m; ++i)
{
int task, x;
fin >> task >> x;
if (task == 0)
{
fout << rightmostExactBS(v, x) << "\n";
}
else if (task == 1)
{
fout << rightmostLessThanBS(v, x) << "\n";
}
else if (task == 2)
{
fout << leftmostGreaterThanBS(v, x) << "\n";
}
}
return 0;
}