/in/foo.cc: In function 'int main()':
/in/foo.cc:10:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   10 |                 if(f%4==0&&f%100!=0||f%400==0)
      |                    ~~~~~~^~~~~~~~~~
/in/foo.cc:6:17: warning: unused variable 'f' [-Wunused-variable]
    6 |         int a,d,f,cnt;
      |                 ^
/in/foo.cc:15:15: warning: 'cnt' may be used uninitialized [-Wmaybe-uninitialized]
   15 |         cout<<cnt;
      |               ^~~
/in/foo.cc:6:19: note: 'cnt' was declared here
    6 |         int a,d,f,cnt;
      |                   ^~~