Cod sursa(job #2850979)

Utilizator MogoneaMIhneaMogonea Mihnea Mihai MogoneaMIhnea Data 17 februarie 2022 20:54:12
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.23 kb
#include <fstream>
using namespace std;
ifstream fin ("cautbin.in");
ofstream fout ("cautbin.out");
int n ,i, nr, x, m;
int v[100001], num[100001];
int dr, st, mij;
int main(){
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    fin>>m;
    for(i=1;i<=m;i++){
        fin>>nr>>x;
        st=1;
        dr=n;
        if(nr==0){
            while(st<=dr){
                mij=(st+dr)/2;
                if(v[mij]<=x)
                    st=mij+1;
                else
                    dr=mij-1;
            }
            if(v[dr]==x)
                num[i]=dr;
            else
                num[i]=-1;
        }
        if(nr==1){
            while(st<=dr){
                mij=(st+dr)/2;
                if(v[mij]<=x)
                    st=mij+1;
                else
                    dr=mij-1;
            }
            num[i]=dr;
        }
        if(nr==2){
            while(st<=dr){
                mij=(st+dr)/2;
                if(v[mij]>=x)
                    dr=mij-1;
                else
                    st=mij+1;
            }
            num[i]=st;
        }
    }
    for(i=1;i<=m;i++)
        fout<<num[i]<<"\n";
    return 0;
}
/*
5
1 3 3 3 5
3
0 3
1 3
2 3
*/