foo.cc: In function 'int main()':
foo.cc:17:67: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   17 |                         if(a[j].di>a[imax].di||a[j].di==a[imax].di&&a[j].nu<a[imax].nu)imax=j;
      |                                                ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~

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