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  1. #include <stdio.h>
  2. #include <stdint.h>
  3.  
  4. int main()
  5. {
  6.   int x;
  7.   scanf("%d", &x);
  8.  
  9.   int n = __builtin_popcount(x);
  10.   printf("%08X", n ? ~0U << 32-n : 0);
  11.  
  12.   return 0;
  13. }
Success #stdin #stdout 0s 4180KB
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277
stdout
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F0000000
https://ideone.com/PfcFaC
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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