Cod sursa(job #2629484)

Utilizator enedumitruene dumitru enedumitru Data 21 iunie 2020 07:37:52
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.66 kb
#include <fstream>
using namespace std;
ifstream f("cautbin.in"); ofstream g("cautbin.out");
int n,m,v[100001];
int main()
{   f>>n;
    for(int i=1;i<=n;++i) f>>v[i];
    int logn;
    for(logn=1; logn<=n; logn<<=1);
    f>>m;
    int tip,x,i,lg;
    for(;m;--m)
    {   f>>tip>>x;
        if(tip<2)
        {   int lg;
            for(lg=logn,i=0;lg;lg>>=1)
                if(i+lg<=n && v[i+lg]<=x) i+=lg;
            if(!tip && v[i]!=x) g<<"-1\n"; else g<<i<<'\n';
            continue;
        }
        i=n;
        for(lg=logn;lg;lg>>=1)
            if(i-lg>0 && v[i-lg]>=x) i-=lg;
        g<<i<<'\n';
    }
    g.close(); f.close(); return 0;
}