foo.c: In function 'main':
foo.c:18:13: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   18 |         if (max=a[0])
      |             ^~~
foo.c:21:21: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   21 |                 if (max=a[y])
      |                     ^~~

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