**O2可爱**
by 博瀚君 @ 2021-07-28 16:22:49
O2 nb %%%
by a1ioua @ 2021-07-28 16:26:45
`ins`中
```cpp
if (v == v(x)) {
cnt(x)++;
return;
}
```
改为
```cpp
if (v == v(x)) {
cnt(x)++, s(x)++;
return;
}
```
---
`del`中
```cpp
if (cnt(x) > 1) cnt(x)--;
else if (s(x) == 0) x = 0;
```
改为
```cpp
if (cnt(x) > 1) cnt(x)--, s(x)--;
if (s(x) == 0) x = 0;
```
# 我好菜
by cmk666 @ 2021-07-28 16:29:13
@[cmk666](/user/127949) 没用
by optimize_2 @ 2021-08-03 21:06:04