foo.cc: In function 'int main()':
foo.cc:36:27: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   36 |                 if(a%4==0 && a%100!=0 || a%400==0)
      |                    ~~~~~~~^~~~~~~~~~~
foo.cc:37:26: warning: 'm' may be used uninitialized [-Wmaybe-uninitialized]
   37 |                         m+=1;
      |                         ~^~~
foo.cc:5:19: note: 'm' was declared here
    5 |         int a,b,d,m;
      |                   ^

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