Cod sursa(job #2883307)

Utilizator Ruxandra009Ruxandra Vasilescu Ruxandra009 Data 1 aprilie 2022 13:28:22
Problema Cautare binara Scor 0
Compilator cpp-32 Status done
Runda Arhiva educationala Marime 0.99 kb
#include <bits/stdc++.h>
using namespace std;
ifstream f("cautbin.in");
ofstream g("cautbin.out");
int N,M,val,x,A[100005],i;
int Caut0(int x)
{
    int st,dr,m,poz;
    st=1; dr=N; poz=-1;
    while(st<=dr){
        m=(st+dr)/2;
        if(A[m]<x)st=m+1;
        else if(A[m]>x)dr=m-1;
        else {poz=m; st=m+1;}
    }
    return poz;
}
int Caut1(int x)
{
    int st,dr,m,poz;
    st=1; dr=N;
    while(st<=dr){
        m=(st+dr)/2;
        if(A[m]<=x){
            st=m+1;
            poz=m;
        }
        else dr=m-1;
    }
    return poz;
}
int Caut2(int x)
{
    int st,dr,m,poz;
    st=1; dr=N;
    while(st<=dr){
        m=(st+dr)/2;
        if(A[m]>=x){poz=m; dr=m-1;}
        else st=m+1;
    }
}
int main()
{
    f>>N;
    for(i=1; i<=N; i++)f>>A[i];

    f>>M;
    for(i=1; i<=M; i++){
        f>>val>>x;
        if(val==0)g<<Caut0(x)<<'\n';
        else if(val==1)g<<Caut1(x)<<'\n';
        else g<<Caut2(x)<<'\n';
    }
    return 0;
}