Language: C++

#include <iostream>
using namespace std;

int main(){
    int t;
    cin >> t;
    int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
  z=0;q=0;
    for(int x = 0;x <= t; x++){
      cin >>n>>a>>b>>c>>d;
      z+=d;
     for (int i=0,i<=n*a*b*c*d;i++){ 
     dw(i)=1;}
      
      for(int y=0;y<=n*a*b*c*d;y++){
       
      if(n>=q*5){q*=5;cw(y)++;}
      if(q*5>n && n>=q*3){q*=3;bw(y)++}
      if(q*3>n && n>q*2){q*=2;aw(y)++;}
      if(q+1==n){dw(y)+=1;dw(y)++;}
      if(q-1==n){dw(y)}+=1;dw(y)++;}  
       vector<int> vec = {aw(),bw(),cw(),dw()};
      }
vector<int> kot;
  while(i<n*a*b*c*d){kot(i) = aw(i)*bw(i)*cw(i)*dw(i);i++
         }
  sort(kot.begin(), kot.end()); 
  reverse(kot.begin(), kot.end());
  cout<<kot(0)<<endl;
      
}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:29: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                             ^~
a.cc:7:29: note: remove parentheses to default-initialize a variable
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                             ^~
      |                             --
a.cc:7:29: note: or replace parentheses with braces to value-initialize a variable
a.cc:7:34: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                  ^~
a.cc:7:34: note: remove parentheses to default-initialize a variable
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                  ^~
      |                                  --
a.cc:7:34: note: or replace parentheses with braces to value-initialize a variable
a.cc:7:39: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                       ^~
a.cc:7:39: note: remove parentheses to default-initialize a variable
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                       ^~
      |                                       --
a.cc:7:39: note: or replace parentheses with braces to value-initialize a variable
a.cc:7:44: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                            ^~
a.cc:7:44: note: remove parentheses to default-initialize a variable
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                            ^~
      |                                            --
a.cc:7:44: note: or replace parentheses with braces to value-initialize a variable
a.cc:12:20: error: expected ';' before '<=' token
   12 |      for (int i=0,i<=n*a*b*c*d;i++){
      |                    ^~
      |                    ;
a.cc:12:20: error: expected primary-expression before '<=' token
   12 |      for (int i=0,i<=n*a*b*c*d;i++){
      |                    ^~
a.cc:13:8: error: too many arguments to function 'int dw()'
   13 |      dw(i)=1;}
      |      ~~^~~
a.cc:7:42: note: declared here
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                          ^~
a.cc:13:8: error: lvalue required as left operand of assignment
   13 |      dw(i)=1;}
      |      ~~^~~
a.cc:17:25: error: too many arguments to function 'int cw()'
   17 |       if(n>=q*5){q*=5;cw(y)++;}
      |                       ~~^~~
a.cc:7:37: note: declared here
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                     ^~
a.cc:17:25: error: lvalue required as increment operand
   17 |       if(n>=q*5){q*=5;cw(y)++;}
      |                       ~~^~~
a.cc:18:34: error: too many arguments to function 'int bw()'
   18 |       if(q*5>n && n>=q*3){q*=3;bw(y)++}
      |                                ~~^~~
a.cc:7:32: note: declared here
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                ^~
a.cc:18:34: error: lvalue required as increment operand
   18 |       if(q*5>n && n>=q*3){q*=3;bw(y)++}
      |                                ~~^~~
a.cc:19:33: error: too many arguments to function 'int aw()'
   19 |       if(q*3>n && n>q*2){q*=2;aw(y)++;}
      |                               ~~^~~
a.cc:7:27: note: declared here
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                           ^~
a.cc:19:33: error: lvalue required as increment operand
   19 |       if(q*3>n && n>q*2){q*=2;aw(y)++;}
      |                               ~~^~~
a.cc:20:20: error: too many arguments to function 'int dw()'
   20 |       if(q+1==n){dw(y)+=1;dw(y)++;}
      |                  ~~^~~
a.cc:7:42: note: declared here
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                          ^~
a.cc:20:20: error: lvalue required as left operand of assignment
   20 |       if(q+1==n){dw(y)+=1;dw(y)++;}
      |                  ~~^~~
a.cc:20:29: error: too many arguments to function 'int dw()'
   20 |       if(q+1==n){dw(y)+=1;dw(y)++;}
      |                           ~~^~~
a.cc:7:42: note: declared here
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                          ^~
a.cc:20:29: error: lvalue required as increment operand
   20 |       if(q+1==n){dw(y)+=1;dw(y)++;}
      |                           ~~^~~
a.cc:21:20: error: too many arguments to function 'int dw()'
   21 |       if(q-1==n){dw(y)}+=1;dw(y)++;}
      |                  ~~^~~
a.cc:7:42: note: declared here
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                          ^~
a.cc:21:23: error: expected ';' before '}' token
   21 |       if(q-1==n){dw(y)}+=1;dw(y)++;}
      |                       ^
      |                       ;
a.cc:21:24: error: expected primary-expression before '+=' token
   21 |       if(q-1==n){dw(y)}+=1;dw(y)++;}
      |                        ^~
a.cc:21:30: error: too many arguments to function 'int dw()'
   21 |       if(q-1==n){dw(y)}+=1;dw(y)++;}
      |                            ~~^~~
a.cc:7:42: note: declared here
    7 |     int n,a,b,c,d,x,y,z,q,aw(),bw(),cw(),dw(),aaa;
      |                                          ^~
a.cc:21:30: error: lvalue required as increment operand
   21 |       if(q-1==n){dw(y)}+=1;dw(y)++;}
      |                            ~~^~~
a.cc:22:8: error: 'vector' was not declared in this scope
   22 |        vector<int> vec = {aw(),bw(),cw(),dw()};
      |        ^~~~~~
a.cc:2:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    1 | #include <iostream>
  +++ |+#include <vector>
    2 | using namespace std;
a.cc:22:15: error: expected primary-expression before 'int'
   22 |        vector<int> vec = {aw(),bw(),cw(),dw()};
      |               ^~~
a.cc:24:1: error: 'vector' was not declared in this scope
   24 | vector<int> kot;
      | ^~~~~~
a.cc:24:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
a.cc:24:8: error: expected primary-expression before 'int'
   24 | vector<int> kot;
      |        ^~~
a.cc:25:9: error: 'i' was not declared in this scope
   25 |   while(i<n*a*b*c*d){kot(i) = aw(i)*bw(i)*cw(i)*dw(i);i++
      |         ^
a.cc:25:22: error: 'kot' was not declared in this scope
   25 |   while(i<n*a*b*c*d){kot(i) = aw(i)*bw(i)*cw(i)*dw(i);i++
      |                      ^~~
a.cc:27:8: error: 'kot' was not declared in this scope
   27 |   sort(kot.begin(), kot.end());
      |        ^~~
a.cc:27:3: error: 'sort' was not declared in this scope; did you mean 'short'?
   27 |   sort(kot.begin(), kot.end());
      |   ^~~~
      |   short
a.cc:28:3: error: 'reverse' was not declared in this scope
   28 |   reverse(kot.begin(), kot.end());
      |   ^~~~~~~
a.cc: At global scope:
a.cc:32:1: error: expected declaration before '}' token
   32 | }
      | ^