Cod sursa(job #1513509)
| Utilizator | Data | 29 octombrie 2015 17:29:35 | |
|---|---|---|---|
| Problema | Cautare binara | Scor | 100 |
| Compilator | cpp | Status | done |
| Runda | Arhiva educationala | Marime | 1.5 kb |
#include <fstream>
using namespace std;
ifstream fin ("cautbin.in");
ofstream fout("cautbin.out");
int v[100010];
int st, dr, mid, t, x, i, n, m;
int main() {
fin>>n;
for (i=1;i<=n;i++)
fin>>v[i];
fin>>m;
for (i=1;i<=m;i++) {
fin>>t>>x;
if (t == 0) {
//cea mai mare pozitie pe care se afla un element cu
//valoarea x
//sau -1 daca aceasta valoare nu se gaseste in sir
//<=x
//>x
st = 1;
dr = n;
while (st <= dr) {
int mid = (st + dr)/2;
if (v[mid] <= x)
st = mid+1;
else
dr = mid-1;
}
if (v[dr] == x)
fout<<dr<<"\n";
else
fout<<"-1\n";
}
if (t == 1) {
st = 1;
dr = n;
while (st <= dr) {
int mid = (st + dr)/2;
if (v[mid] <= x)
st = mid+1;
else
dr = mid-1;
}
fout<<dr<<"\n";
}
if (t == 2) {
st = 1;
dr = n;
while (st <= dr) {
int mid = (st + dr)/2;
if (v[mid] < x)
st = mid+1;
else
dr = mid-1;
}
fout<<st<<"\n";
}
}
return 0;
}
