foo.cc: In function 'int main()':
foo.cc:8:25: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    8 |  cout << (year % 4 == 0 && year % 100 != 0 || year % 400 == 0 ? "Yes" : "No") << endl;
      |           ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~

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