@[违规用户名cVn1I&r!](/space/show?uid=60410)
s[0]=='C'时y无读入
```
int x,y;
int fx=find(x),fy=find(y);
```
```cpp
int fx=find(x),fy;
if(s[0]=='M')
scanf("%d",&y),fy=find(y);
```
就行了
by Sparks_Pion @ 2018-10-28 18:06:53
代码收下了 ^-^
by Sparks_Pion @ 2018-10-28 18:23:13
@[Sparks_Pion](/space/show?uid=58469) 啊,多谢
```cpp
for(int i=1;i<=70000;i++)f[i]=i,num[i]=1;
```
改成
```cpp
for(int i=0;i<=70000;i++)f[i]=i,num[i]=1;
```
就行了,这个问题应该只会在第一条是C的时候有
(但是本机测试没问题啊.....)
by 违规用户名cVn1I&r! @ 2018-10-28 20:39:57
@[违规用户名cVn1I&r!](/space/show?uid=60410)
[开O2](https://www.luogu.org/record/show?rid=12649869)
[不开O2](https://www.luogu.org/recordnew/show/12650085)
一样的代码……
by Sparks_Pion @ 2018-10-28 20:49:28