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MATDYS.cpp
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MATDYS.cpp
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#include <iostream>
#include <iomanip>
#include <string>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <vector>
#include <algorithm>
#include <map>
#include <set>
#include <sstream>
#include <queue>
#include <stack>
#define endl "\n"
#define si(a) scanf("%d",&a)
#define sii(a,b) scanf("%d %d",&a,&b)
#define siii(a,b,c) scanf("%d %d %d",&a,&b,&c)
#define sl(a) scanf("%lld",&a)
#define sll(a,b) scanf("%lld %lld",&a,&b)
#define pf printf
#define vi vector<int>
#define vii vector<pair<int,int> >
#define pii pair<int,int>
#define all(c) c.begin(),c.end()
#define ms(a,c) memset(a,c,sizeof(a))
#define tr(c,i) for(decltype((c).begin()) i=(c).begin();i!=(c).end();i++)
#define trr(c,i) for(decltype((c).rbegin()) i=(c).rbegin();i!=(c).rend();i++)
using namespace std;
#define N 100001
#define mod 1000000007
#define inf 1e9
typedef long long ll;
typedef unsigned long long ull;
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
// freopen("Input.txt","r",stdin);
// freopen("Output.txt","w",stdout);
int q;
cin>>q;
for(int i=0;i<q;i++)
{
ull n,k,next;
cin>>n>>k;
n--;
if(k%2)
k=(1ULL<<n)+k/2;
else
k=k/2;
while(n>0)
{
ull pos=k%(1ULL<<n);
n--;
if(pos%2)
next=(1ULL<<n)+pos/2;
else
next=pos/2;
k+=next-pos;
}
cout<<k<<endl;
}
return 0;
}