#include <bits/stdc++.h>
 
using namespace std;
 
#define SPEED ios::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define fileio freopen("in.in", "r", stdin),freopen("out.out", "w", stdout);
#define ll long long int
#define FF first
#define SS second
#define mp make_pair
#define pb push_back
#define pii pair<int,int>
#define pll pair<long long int,long long int>
#define sd(x) scanf("%d",&x)
#define slld(x) scanf("%lld",&x)
#define pd(x) printf("%d\n",x)
#define plld(x) printf("%lld\n",x)
#define pss printf
#define MOD 1000000007
#define INF 1e18
#define eps 0.00001
#define endl '\n'
#define debug(n1) cout<<n1<<endl
ll t,n,d;
int main()
{
	SPEED;
	cin>>t;
	while(t--)
	{
		cin>>n>>d;
		n--;
		ll ans=0;
		if(n%2==0)
			ans=(n)*127+d;
		else
			ans=(n)*127+(d^127);
		cout<<ans<<endl;
	}
	return 0;
}