Cod sursa(job #1379242)

Utilizator MihneaGhiraMihnea MihneaGhira Data 6 martie 2015 17:08:04
Problema Cautare binara Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.54 kb
#include<fstream>
using namespace std;
ifstream fin("cautbin.in");
ofstream fout("cautbin.out");
int n,m,i,p,u,mid,T,x,ok,j,maxim,minim;
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;
        ok=0;
        for(j=1;j<=n;j++)
            if(v[j]==x)
                ok=1;
        if(ok==0){
            fout<<-1<<"\n";
            continue;
        }
        if(T==0){
            p=1;
            u=n;

            while(p<=u){
                mid=(p+u)/2;
                if(x>=v[mid]){
                    p=mid+1;
                }
                else
                    u=mid-1;
            }
            fout<<p-1<<"\n";
        }
        if(T==1){
            p=1;
            u=n;
            maxim=0;
            while(p<=u){
                mid=(p+u)/2;
                if(v[mid]<=x){
                    p=mid+1;
                    if(maxim<mid)
                        maxim=mid;
                }
                else
                    u=mid-1;
            }
            fout<<maxim<<"\n";
        }
        if(T==2){
            p=1;
            u=n;
            minim=n+1;
            while(p<=u){
                mid=(p+u)/2;
                if(x<=v[mid]){
                    p=mid+1;
                    if(minim>=mid)
                        minim=mid;
                }
                else
                    u=mid-1;
            }
            fout<<minim<<"\n";
        }
    }
    return 0;
}