#include <bits/stdc++.h>
using namespace std;
 
// Speed
#define fast_io ios::sync_with_stdio(0); cin.tie(0); cout.tie(0)
 
// Typedefs
#define int long long
#define pb push_back
#define ff first
#define ss second
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(x) ((int)(x).size())
#define endl '\n'
 
// Loops
#define rep(i,a,b) for(int i=a;i<b;++i)
#define each(x, a) for (auto &x : a)
 
void solve() {
    int k,x;
    cin >> k>>x;
    int sum=0,count=0;
    rep(i,1,2*k){
    	if(i<=k&&sum<x){
    	sum+=i;
    	count++;
    }
    	else if(i>k&&sum<x){
    	sum=sum+i-2*(i-k);
    	count++;
    	} 
    	else
    	break;
    }
    cout<<count<<endl;
}
 
int32_t main() {
    fast_io;
    int t;
    cin >> t;
    while (t--) solve();
    return 0;
}
 

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7
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1 2
3 7
2 5
100 1
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