/* -*- coding: utf-8 -*-
 *
 * 2420.cc:  No.2420 Simple Problem - yukicoder
 */

#include<cstdio>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

typedef long long ll;

/* global variables */

/* subroutines */

/* main */

int main() {
  int tn;
  scanf("%d", &tn);

  while (tn--) {
    int a, b;
    scanf("%d%d", &a, &b);

    // sqrt(a)+sqrt(b)<x -> (sqrt(a)+sqrt(b))^2=a+b+2sqrt(a)sqrt(b)<x^2
    // -> 2sqrt(a)sqrt(b)<x^2-(a+b) -> 4ab<(x^2-(a+b))^2

    ll d = 4LL * a * b;
    ll e0 = 0, e1 = 2000000001;
    while (e0 + 1 < e1) {
      ll e = (e0 + e1) / 2;
      if (e * e > d) e1 = e;
      else e0 = e;
    }
    //printf("e1=%lld\n", e1);

    ll f = e1 + (a + b);
    ll x0 = 0, x1 = 4000000001LL;
    while (x0 + 1 < x1) {
      ll x = (x0 + x1) / 2;
      if (x * x >= f) x1 = x;
      else x0 = x;
    }

    printf("%lld\n", x1);
  }

  return 0;
}