class Solution {
public:
int NumberOf1(int n) {
int res = 0;
while(n) {
n = n & (n-1);
res ++;
}
return res;
}
};
class Solution {
public:
int NumberOf1(int n) {
int res = 0;
while(n) {
n = n & (n-1);
res ++;
}
return res;
}
};