Cod sursa(job #2664899)

Utilizator RazvanLazar2004Lazar Razvan Gabriel RazvanLazar2004 Data 29 octombrie 2020 17:59:24
Problema Cautare binara Scor 40
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.16 kb
#include<fstream>
long long int v[100001];
using namespace std;
int main(){
    ifstream in("cautbin.in");
    ofstream out("cautbin.out");
    long long int n,m,x,y,t=1;
    in>>n;
    while(t*2<=n){
        t*=2;
    }
    for(long long int i=1;i<=n;i++){
        in>>v[i];
    }
    in>>m;
    for(long long int i=1;i<=m;i++){
        in>>x>>y;
        if(x==0){
            long long int r=0;
            for(long long int i=t;i>0;i/=2){
                if(v[r+i]<=y && r+i<=n){
                    r+=i;
                }
            }
            if(v[r]==y){
                out<<r<<'\n';
            }else{
                out<<"-1"<<'\n';
            }
        }
        if(x==1){
            long long int r=0;
            for(long long int i=t;i>0;i/=2){
                if(v[r+i]<=y && r+i<=n){
                    r+=i;
                }
            }
            out<<r<<'\n';
        }
        if(x==2){
            long long int r=n+1;
            for(long long int i=t;i>0;i/=2){
                if(v[r-i]>=y && r-i>0){
                    r-=i;
                }
            }
            out<<r<<'\n';
        }
    }
}