题解 | #排列与二进制#每一项都除够2，和相加
排列与二进制
https://www.nowcoder.com/practice/647fc23dc4e147328cc484e3aeb6cc2a
#include<cstdio>
int main(){
int n, m;
while (scanf("%d%d", &n, &m) != EOF){
if (n == 0 && m == 0){
break;
}
int ans = 0;
for (int i = 0; i < m; i++){
int k = n - i;
while (k % 2 == 0){
ans++;
k= k / 2;
}
}
printf("%d\n", ans);
}
}