/in/foo.cc: In function 'int main()':
/in/foo.cc:6:18: warning: right operand of comma operator has no effect [-Wunused-value]
    6 |         cin>>V,G,M,N;
      |                  ^
/in/foo.cc:6:20: warning: right operand of comma operator has no effect [-Wunused-value]
    6 |         cin>>V,G,M,N;
      |                    ^
/in/foo.cc:6:21: warning: right operand of comma operator has no effect [-Wunused-value]
    6 |         cin>>V,G,M,N;
      |                     ^
/in/foo.cc:7:17: warning: 'M' is used uninitialized [-Wuninitialized]
    7 |         if(0.5*V<M)
      |            ~~~~~^~
/in/foo.cc:5:17: note: 'M' was declared here
    5 |         int V,G,M,N;
      |                 ^
/in/foo.cc:10:23: warning: 'N' may be used uninitialized [-Wmaybe-uninitialized]
   10 |                 cout<<N<<endl;
      |                       ^
/in/foo.cc:5:19: note: 'N' was declared here
    5 |         int V,G,M,N;
      |                   ^