Language: C++

#include <bits/stdc++.h>
using namespace std;

int main(){
    int n;
    scanf("%d",&n);
    while(n--){
        long long a, b;
        scanf("%lld%lld",&a,&b);
        long long ua = min(a-1, (a*b-1)/(b+1));
        long long ub = min(b-1, (a*b-1)/(a+1));
        long long ans = 0;
        long long sq = (long long)(sqrt(a * b - 1) + 1e-12);
        if(ua <= sq){
            ans += ua;
        }else{
            ans += sq + min(max(sq - b, 0), ua - sq);
        }
        if(ub <= sq){
            ans += ub;
        }else{
            ans += sq + min(max(sq - a, 0), ub - sq);
        }
        printf("%lld\n", ans);
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:17:32: error: no matching function for call to 'max(long long int, int)'
   17 |             ans += sq + min(max(sq - b, 0), ua - sq);
      |                             ~~~^~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:17:32: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   17 |             ans += sq + min(max(sq - b, 0), ua - sq);
      |                             ~~~^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:17:32: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   17 |             ans += sq + min(max(sq - b, 0), ua - sq);
      |                             ~~~^~~~~~~~~~~
a.cc:22:32: error: no matching function for call to 'max(long long int, int)'
   22 |             ans += sq + min(max(sq - a, 0), ub - sq);
      |                             ~~~^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:22:32: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   22 |             ans += sq + min(max(sq - a, 0), ub - sq);
      |                             ~~~^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:22:32: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   22 |             ans += sq + min(max(sq - a, 0), ub - sq);
      |                             ~~~^~~~~~~~~~~