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GrayCode.cpp
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34 lines (31 loc) · 854 Bytes
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//============================================================================
// The gray code is a binary numeral system where two successive values differ
// in only one bit.
//
// Given a non-negative integer n representing the total number of bits in the
// code, print the sequence of gray code. A gray code sequence must begin with
// 0.
//
// For example, given n = 2, return [0,1,3,2]. Its gray code sequence is:
//
// 00 - 0
// 01 - 1
// 11 - 3
// 10 - 2
//============================================================================
#include <vector>
using namespace std;
class Solution {
public:
vector<int> grayCode(int n) {
vector<int> result;
int num = 1 << n;
for (int i = 0; i < num; i++) {
result.push_back((i >> 1) ^ i);
}
return result;
}
};
int main() {
return 0;
}