```cpp
if(ans==1) cout<<"1"<<endl;
else if(ans==2) cout<<"2"<<endl;
else cout<<"1"<<endl<<a[1]*a[2];
```
在上述代码中，只需把第 $1$ 个判断删掉即可，即：
```cpp
if(ans==2) cout<<"2"<<endl;
else cout<<"1"<<endl<<a[1]*a[2];
```
by TemplateClass @ 2023-08-24 20:37:21
@[long_ji](/user/947857)
by TemplateClass @ 2023-08-24 20:37:26
@[TemplateClass](/user/735713) 感谢
by long_ji @ 2023-08-24 20:38:22
能讲下思路吗，pls
by korone @ 2024-01-10 16:09:55