题解 | #查找输入整数二进制中1的个数#

//一次遍历

using namespace std;
int main(){
    string str;
    getline(cin, str);
    string ans, pre;
    for(int i = 0; i < str.size(); i ++ ){
        if(isalpha(str[i])){
            while(isalpha(str[i])){
                pre += str[i];
                i ++;
            }
            ans = pre + " " + ans;
            pre = "";
        }
    }
    cout<< ans << endl;
    return 0;
}