foo.cc: In function 'int main()':
foo.cc:7:18: warning: statement has no effect [-Wunused-value]
    7 |                 k>n;
      |                 ~^~
foo.cc:8:18: warning: statement has no effect [-Wunused-value]
    8 |                 l>m;
      |                 ~^~
foo.cc:9:18: warning: statement has no effect [-Wunused-value]
    9 |                 k>l;
      |                 ~^~
foo.cc:11:15: warning: 'k' is used uninitialized [-Wuninitialized]
   11 |         cout<<k<<endl;
      |               ^
foo.cc:5:20: note: 'k' was declared here
    5 |         int n=5520,k,m,l;
      |                    ^

[Hydro](https://hydro.ac)提供评测服务