Reverse bits of a given 32 bits unsigned integer.
For example, given input 43261596 (rePResented in binary as 00000010100101000001111010011100), return 964176192 (represented in binary as 00111001011110000010100101000000).
class Solution {public: uint32_t reverseBits(uint32_t n) { uint32_t ans = 0; for(int i = 0, j = 0; i < 32; ++i, ++j){ ans += n & 1; if(j < 31) ans <<= 1; n >>= 1; } return ans; }};新聞熱點
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