Cod sursa(job #1384223)
Utilizator | Data | 10 martie 2015 22:50:39 | |
---|---|---|---|
Problema | Cautare binara | Scor | 60 |
Compilator | cpp | Status | done |
Runda | Arhiva educationala | Marime | 1.49 kb |
#include <fstream>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
long long a[100001], n, m, i, j, x;
short optiune;
int main()
{
f >> n;
for (i = 1; i <= n; i++)
f >> a[i];
f >> m;
for (i = 1; i <= m; i++)
{
f >> optiune >> x;
if (optiune == 0)
{
int st = 1, dr = n, m;
while (st <= dr)
{
m = (st+dr)/2;
if (a[m] <= x)
st = m+1;
else
dr = m-1;
}
m = (st+dr)/2;
if (a[m] > x)
m--;
if (a[m] == x)
g << m << "\n";
else
g << -1 << "\n";
}
else if (optiune == 1)
{
int st = 1, dr = n, m;
while (st < dr)
{
m = (st+dr)/2;
if (a[m] <= x)
st = m+1;
else
dr = m;
}
m = (st+dr)/2;
if (a[m] > x)
m--;
g << m << "\n";
}
else if (optiune == 2)
{
int st = 1, dr = n, m;
while (st < dr)
{
m = (st+dr)/2;
if (a[m] < x)
st = m+1;
else
dr = m;
}
m = (st+dr)/2;
if (a[m] < x)
m++;
g << m << "\n";
}
}
return 0;
}