Cod sursa(job #1515974)

Utilizator RaresGabrielMircea Rares-Gabriel RaresGabriel Data 2 noiembrie 2015 15:53:55
Problema Cautare binara Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.12 kb
#include <iostream>
#include <fstream>
using namespace std;

int n,test,v[100001];
int test1(int x){
    int st=1,dr=n,p=-1,m;
    while(st<=dr){
        m=(st+dr)/2;
        if(v[m]==x){
            p=m;
            st=m+1;
        }
        else if(x<v[m])dr=m-1;
        else st=m+1;
    }
    return p;
}
int test2(int x){
    int st=1,dr=n,p=0,m;
    while(st<=dr){
        m=(st+dr)/2;
        if(x<v[m])dr=m-1;
        else{
            p=m;
            st=m+1;
        }
    }
    return p;
}
int test3(int x){
    int st=1,dr=n,p=-1,m;
    while(st<=dr){
        m=(st+dr)/2;
        if(x<=v[m]){
            dr=m-1;
            p=m;
        }
        else st=m+1;
    }
    return p;
}
int main(){
    ifstream fin("cautbin.in");
    ofstream fout("cautbin.out");

    int x,y;
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>v[i];

    fin>>test;
    for(int i=1;i<=test;i++){
        fin>>x>>y;
        if(x==0)fout<<test1(y)<<"\n";
        if(x==1)fout<<test2(y)<<"\n";
        if(x==2)fout<<test3(y)<<"\n";
    }
    fin.close();
    fout.close();
    return 0;
}