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-rw-r--r--number_complement.c16
-rw-r--r--number_complement.py26
2 files changed, 42 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
+}
diff --git a/number_complement.py b/number_complement.py
new file mode 100644
index 0000000..149a834
--- /dev/null
+++ b/number_complement.py
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+# 476. Number Complement
+
+"""
+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
+"""
+
+
+class Solution(object):
+ def findComplement(self, num):
+ """
+ :type num: int
+ :rtype: int
+ """
+ i = 1
+ while i <= num:
+ i = i << 1
+ return (i - 1) ^ num
+
+
+if __name__ == "__main__":
+ obj = Solution()
+ print(obj.findComplement(5))
+ print(obj.findComplement(1))