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class Solution {
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 public:
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  uint32_t reverseBits(uint32_t n) {
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    int ans = 0;
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    int i = 1;
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    int bit = 0;
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    while (i < 32) {
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      bit = n & 1;
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      ans = ans | bit;
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      n = n >> 1;
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      ans = ans << 1;
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      i++;
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    }
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    if (i == 32) {
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      bit = n & 1;
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      ans = ans | bit;
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    }
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    return ans;
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  }
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};