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Codeforces round 1661(B. Getting Zero)

using second operation the answer is maximum is 15 because 215=32768
so we need to pre-calculate all the illegible input 0 to 32768 using second operation
Then just increment 1(using first operation) from input check is it minimum is not !

///Bismillahir Rahmanir Rahim
///Author: Tanvir Ahmmad
///CSE,Islamic University,Bangladesh

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<string>
#include<cstring>
#include<sstream>
#include<cmath>
#include<cstring>
#include<vector>
#include<queue>
#include<map>
#include<set>
#include<stack>
#include<vector>
#include<iterator>
#include <functional> ///sort(arr,arr+n,greater<int>()) for decrement of array
/*every external angle sum=360 degree
  angle find using polygon hand(n) ((n-2)*180)/n*/
///Floor[Log(b)  N] + 1 = the number of digits when any number is represented in base b
using namespace std;
typedef long long ll;

int main()
{
    ll store_cnt[32770],n,qus;
    store_cnt[32768]=0;
    for(ll i=0;i<32768;i++)
    {
        ll cnt=0,num=i;
        while(num!=0)
            num=(num*2)%32768,cnt++;
        store_cnt[i]=cnt;
    }
    cin>>n;
    while(n--)
    {
        cin>>qus;
        ll ans=store_cnt[qus],po=0;
        for(ll i=qus;i<=(qus+20) && i<=32768;i++,po++) ans=min(ans,store_cnt[i]+po);
        cout<<ans<<endl;
    }
    return 0;
}
///Alhamdulillah
 
Problem Link:https://codeforces.com/problemset/problem/1661/B

 

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