Cod sursa(job #1594375)

Utilizator PetruZZatic Petru PetruZ Data 9 februarie 2016 14:29:01
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.05 kb
#include <fstream>

using namespace std;

ifstream cin ("cautbin.in");
ofstream cout ("cautbin.out");

int a[100005], n, m;

int caut( int nr ){
    
    int pas,i;
    for(pas=1; pas<n; pas <<=1);
    
    for(i=0; pas; pas >>=1)
             if((i+pas<n)&&(a[i+pas]<=nr)) i+=pas;
    return i;
    }

int main (){
    
    cin >> n;
    for(int i(0); i<n; i++) cin >> a[i];
    
    cin >> m;
    
    int x,nr,rz;
    for(int i(0); i<m; i++) {
            
            cin >> x >> nr;
            if(x==0){
                     rz=caut(nr);
                     if(a[rz]==nr) cout << rz+1 << "\n";
                     else cout << -1 << "\n";
                     } 
            
            if(x==1){
                     cout << caut(nr)+1 << "\n";
                     }
            
            if(x==2){
                     rz=caut(nr-1);
                     if(a[rz]==nr) cout << rz+1;
                     else cout << rz+2;
                     }
            
            }
    
    
    
return 0;    
}