foo.cc: In function ‘int main()’:
foo.cc:14:25: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   14 |                 if(del<0&&a>m||b>m||c>m)
      |                    ~~~~~^~~~~
foo.cc:27:32: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   27 |                         if(zi<0&&mu>0||zi>0&&mu>0)cout<<zi<<'/'<<mu<<endl;
      |                            ~~~~^~~~~~
foo.cc:28:37: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses]
   28 |                         else if(zi>0&&mu<0||zi<0&&mu<0)cout<<-zi<<'/'<<-mu<<endl;
      |                                 ~~~~^~~~~~

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