foo.c: In function 'main':
foo.c:20:21: error: 'imax' undeclared (first use in this function); did you mean 'nmax'?
   20 |         printf("%d",imax);
      |                     ^~~~
      |                     nmax
foo.c:20:21: note: each undeclared identifier is reported only once for each function it appears in

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