Cod sursa(job #2378708)

Utilizator enedumitruene dumitru enedumitru Data 12 martie 2019 15:59:00
Problema Cautare binara Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.66 kb
#include <bits/stdc++.h>
using namespace std;
ifstream f("cautbin.in"); ofstream g("cautbin.out");
int n,logn,v[100001];
int main()
{   f>>n;
    for(int i=1;i<=n;++i) f>>v[i];
    for(logn=1; logn<=n; logn<<=1);
    int T;
    f>>T;
    for(int tip,x;T;--T)
    {   f>>tip>>x;
        if(tip<2)
        {   int lg,i;
            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';
        }
        else
        {   int lg,i;
            for(lg=logn,i=n;lg;lg>>=1)
            if(i-lg>0 && v[i-lg]>=x) i-=lg;
            g<<i<<'\n';
        }
    }
    return 0;
}