运行 ID: 46314

Main.cc: In function ‘void dfs(int, int, int)’:
Main.cc:12:15: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   if(n>=a) cnt+=ex_37(n);
            ~~~^~~~~~~~~~
Main.cc:12:24: error: assignment of read-only location ‘cnt’
   if(n>=a) cnt+=ex_37(n);
                        ^
Main.cc:12:24: error: cannot convert ‘int (*)()’ to ‘int()’ in assignment
Main.cc: In function ‘int main()’:
Main.cc:26:8: warning: the address of ‘int cnt()’ will never be NULL [-Waddress]
  cout<