#ifdef SENJAN
#define _GLIBCXX_DEBUG
#else
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#endif
#include <bits/stdc++.h>
#include <atcoder/all>
#include <boost/multiprecision/cpp_int.hpp>
using namespace std;
using namespace atcoder;
using ll=long long;
using ull=unsigned long long;
using ld=long double;
using bint = boost::multiprecision::cpp_int;
using graph=vector<vector<int>>;
template<class T> using min_priority_queue=priority_queue<T,vector<T>,greater<T>>;
constexpr int INF32=INT_MAX/2;
constexpr ll INF64=LLONG_MAX/2;
constexpr ld PI=3.14159265358979323846;
constexpr int dx[]={0,0,-1,1,-1,-1,1,1},dy[]={-1,1,0,0,-1,1,-1,1};
template<class T> inline bool chmax(T &a,T b){return a<b?a=b,true:false;}
template<class T> inline bool chmin(T &a,T b){return a>b?a=b,true:false;}
inline void dispYN(bool a){cout<<(a?"YES":"NO")<<endl;}
inline void dispYn(bool a){cout<<(a?"Yes":"No")<<endl;}
inline void dispyn(bool a){cout<<(a?"yes":"no")<<endl;}
void _main();
int main(){cin.tie(0)->sync_with_stdio(0);cout<<fixed<<setprecision(16);_main();}

ll ll_sqrt(ll x){
  ll l=0, r=1LL<<31;
  while(r-l>1){
    ll m=(l+r)/2;
    if(m*m<=x) l=m;
    else r=m;
  }
  return l;
}

void _main(){
  int n; cin >> n;
  while(n--){
    ll a, b; cin >> a >> b;
    ll x = a+b+ll_sqrt(4*a*b);
    ll l=0, r=1LL<<31;
    while(r-l>1){
      ll m=(l+r)/2;
      if(m*m<=x) l=m;
      else r=m;
    }
    cout << r << endl;
  }
}