foo.cc: In function 'int main()':
foo.cc:9:18: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    9 |         if(i%4==0&&i%100!=0 || i%400==0){
      |            ~~~~~~^~~~~~~~~~
foo.cc:17:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   17 |                 if(i%4==0&&i%100!=0 || i%400==0){
      |                    ~~~~~~^~~~~~~~~~

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