class Solution {public:    int hammingWeight(uint32_t n) {        string aaa = toBinary(n);        in count = 0;        for(int i = 0; i < sizeof(aaa); i++)    {            if(aaa[i] == "1")                count++;        }        return count;    }        string toBinary(unsigned int val)    {        string aaa = "";        for(int i = 16; i >= 0; i--)    {            if(val & (1 << i))                aaa += "1";            else                aaa += "0";        }        return aaa;    }};