贪心错了
by yuzhechuan @ 2019-12-13 07:29:35
把
```cpp
if (val + (1 << p) <= M && a == 1)
val += 1 << p, ans += a << p;
else ans += b << p;
```
改成
```cpp
if(b==1) ans+=b<<p;
else
if (val + (1 << p) <= M && a == 1)
val += 1 << p, ans += a << p;
```
by yuzhechuan @ 2019-12-13 07:30:04
@[yuzhechuan](/user/65735) 啊啊啊好的！蟹蟹！
by Blazar北极星 @ 2019-12-18 10:09:00