Cod sursa(job #1650967)

Utilizator MihneaGhiraMihnea MihneaGhira Data 11 martie 2016 22:12:49
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.26 kb
#include<fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n,i,st,dr,x,T,m,mid;
int v[100010];
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){
            st=1;
            dr=n;
            while(st<dr){
                mid=st+(dr-st)/2;
                if(x>=v[mid]){
                    st=mid+1;
                }
                else{
                    dr=mid-1;
                }
            }
            if(v[st-1]==x)
                fout<<st-1<<"\n";
            else
                fout<<"-1"<<"\n";
        }
        if(T==1){
            st=1;
            dr=n;
            while(st<dr){
                mid=st+(dr+st)/2;
                if(x<v[mid])
                    dr=mid-1;
                else
                    st=mid+1;
            }
            fout<<dr-1<<"\n";
        }
        if(T==2){
            st=1;
            dr=n;
            while(st<dr){
                mid=st+(st+dr)/2;
                if(v[mid]>=x)
                    dr=mid-1;
                else
                    st=mid+1;
            }
            fout<<dr+1<<"\n";
        }
    }
    return 0;
}