foo.cc: In function 'int main()':
foo.cc:15:36: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   15 |    if(b[i]>=1&&b[j]>=1&&(i!=j||i==j&&b[i]>=2)&&(i+j)%17>=ma)
      |                                ~~~~^~~~~~~~~
foo.cc:6:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    6 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
foo.cc:9:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |   scanf("%d",&a);
      |   ~~~~~^~~~~~~~~

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