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author | Jack Sangdahl <[email protected]> | 2024-08-21 18:52:54 -0600 |
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committer | Jack Sangdahl <[email protected]> | 2024-08-21 18:52:54 -0600 |
commit | 77f46021e62b1d16803e746db4a39d22d17700e2 (patch) | |
tree | 93831ef8dce8c9988391ad0c10b7673b52640fd9 /number_complement.c | |
parent | 716c5f21d28b5fb06efd5cd637ae14056d1eead8 (diff) | |
download | leetcode-77f46021e62b1d16803e746db4a39d22d17700e2.tar.gz leetcode-77f46021e62b1d16803e746db4a39d22d17700e2.zip |
476. number complement
Diffstat (limited to 'number_complement.c')
-rw-r--r-- | number_complement.c | 16 |
1 files changed, 16 insertions, 0 deletions
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 +} |