如果要将整数A转换为B，需要改变多少个bit位？
您在真实的面试中是否遇到过这个题？
Yes
样例
如把31转换为14，需要改变2个bit位。
(31)10=(11111)2
(14)10=(01110)2
class Solution {
public:
/**
*@param a, b: Two integer
*return: An integer
*/
deque<int> trantobinary(int a){
deque<int> vi;
while(a!=0){
int rem=a%2;
int res=a/2;
vi.push_back(rem);
a=res;
}
return vi;
}
deque<long long> tobinary(long long num){
deque<long long> d;
if(num<0){
num=4294967296+num;
}
while(num!=0){
//余数
int rem=num%2;
//商
int res=num/2;
num=res;
d.push_back(rem);
}
return d;
}
int bitSwapRequired(int a, int b) {
// write your code here
int counts=0;
deque<long long> va=tobinary(a);
deque<long long> vb=tobinary(b);
int diff=va.size()-vb.size();
diff=abs(diff);
if((va.size())<(vb.size())){
for(int i=0;i<diff;i++){
va.push_back(0);
}
}
else{
for(int i=0;i<diff;i++){
vb.push_back(0);
}
}
// cout<<counts<<endl;
// counts=0;
for(int i=0;i<va.size();i++){
if(va[i]!=vb[i]){
// cout<<"i :"<<i<<" va :"<<va[i]<<" vb :"<<vb[i]<<" counts: "<<counts<<" "<<endl;
counts++;
}
}
return counts;
}
};
