From 77f46021e62b1d16803e746db4a39d22d17700e2 Mon Sep 17 00:00:00 2001 From: Jack Sangdahl Date: Wed, 21 Aug 2024 18:52:54 -0600 Subject: 476. number complement --- number_complement.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 number_complement.c (limited to 'number_complement.c') diff --git a/number_complement.c b/number_complement.c new file mode 100644 index 0000000..297f22f --- /dev/null +++ b/number_complement.c @@ -0,0 +1,16 @@ +// 476. Number Complement +#include "leetcode.h" + +/* + * the complement of an integer is the integer you get when you flip all the 0's + * to 1's and all the 1's to 0's in its binary representation. for example, the + * integer 5 is "101" in binary and its complement is "010", which is the + * integer 2. given an integer 'num', return its complement + */ + +int findComplement(int num) { return (uint)~0 >> __builtin_clz(num) ^ num; } + +int main() { + printf("%d\n", findComplement(5)); // expect: 2 + printf("%d\n", findComplement(1)); // expect: 0 +} -- cgit v1.2.3