Cod sursa(job #1418599)

Utilizator MihneaGhiraMihnea MihneaGhira Data 13 aprilie 2015 15:10:32
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.18 kb
#include<fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n,m,i,t,x,mid,p,u;
int v[100001];
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){
            p=1;
            u=n;
            while(p<=u){
                mid=(p+u)/2;
                if(v[mid]<=x)
                    p=mid+1;
                else
                    u=mid-1;
            }
            if(v[u]==x)
                fout<<u<<"\n";
            else
                fout<<"-1\n";
        }
        if(t==1){
            p=1;
            u=n;
            while(p<=u){
                mid=(p+u)/2;
                if(v[mid]<=x)
                    p=mid+1;
                else
                    u=mid-1;
            }
            fout<<u<<"\n";
        }
        if(t==2){
            p=1;
            u=n;
            while(p<=u){
                mid=(p+u)/2;
                if(v[mid]>=x)
                    u=mid-1;
                else
                    p=mid+1;

            }
            fout<<p<<"\n";
        }
    }
    return 0;
}