Cod sursa(job #1728737)

Utilizator MihneaGhiraMihnea MihneaGhira Data 13 iulie 2016 16:24:59
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.27 kb
#include<fstream>
#include<algorithm>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int N,M,i,mid,dr,st,m,x,y;
int v[100010];
int main(){
    fin>>N;
    for(i=1;i<=N;i++)
        fin>>v[i];
    sort(v+1,v+N+1);
    fin>>M;
    for(m=1;m<=M;m++){
        fin>>x>>y;
        if(x==0){
            st=1;
            dr=N;
            while(st<=dr){
                mid=st+(dr-st)/2;
                if(y>=v[mid])
                    st=mid+1;
                else
                    dr=mid-1;
            }
            if(v[st-1]==y)
                fout<<st-1<<"\n";
            else
                fout<<-1<<"\n";
        }
        if(x==1){
            st=1;
            dr=N;
            while(st<=dr){
                mid=st+(dr-st)/2;
                if(v[mid]<=y)
                    st=mid+1;
                else
                    dr=mid-1;
            }
            fout<<dr<<"\n";
        }
        if(x==2){
            st=1;
            dr=N;
            while(st<=dr){
                mid=st+(dr-st)/2;
                if(v[mid]>=y)
                    dr=mid-1;
                else
                    st=mid+1;
            }
            fout<<dr+1<<"\n";
        }
    }
    return 0;
}