foo.cc: In function 'int main()':
foo.cc:22:16: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   22 |  if((year%4==0 && year%100!=0 || year%400==0) && month>=3)
      |      ~~~~~~~~~~^~~~~~~~~~~~~~
foo.cc:6:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    6 |  scanf("%d%d%d", &year,&month,&day);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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