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  1. #include <stdio.h>
  2.  
  3. int
  4. main(void)
  5. {
  6.   if (!stdin || (stdin = 0, main()))
  7.     printf("hello");
  8.   else
  9.     printf("world");
  10.   return 0;
  11. }
  12.  
Success #stdin #stdout 0.01s 1720KB
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stdin
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Standard input is empty
stdout
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helloworld
https://ideone.com/q5Y7j
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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