@[月离](/space/show?uid=125133)
maybe加边错了？
```cpp
if(opt==1){
Read(x); Read(y); Read(z);
Add_Edge(x,y,-z);
}
if(opt==2){
Read(x); Read(y); Read(z);
Add_Edge(y,x,z);
}
if(opt==3){
Read(x); Read(y);
Add_Edge(x,y,0);
Add_Edge(y,x,0);
}
```
by oisdoaiu @ 2019-11-04 11:45:55
怎么说呢...
你的那种加边要求最长路
spfa里面
```cpp
if(dis[v]<dis[u]+w)
```
这句话把小于改成大于应该也阔以
by oisdoaiu @ 2019-11-04 11:48:53
您最后初始化一直初始化的是dis[n]啊QAQ
by kma_093 @ 2019-11-04 11:51:15
改成初始化dis[i]就过了……
by kma_093 @ 2019-11-04 11:51:49
@[kma_093](/space/show?uid=43515) 啊，我傻逼了
恭喜你勇者，你拯救了这个zz
by 月离 @ 2019-11-04 11:57:13
@[月离](/space/show?uid=125133) 恭喜你啊zz成功抄了题解
by [已注销]!A8&kFzt @ 2019-11-04 12:01:53
@[骨古](/space/show?uid=114241) 恭喜你啊zz想再棕一次
by 月离 @ 2019-11-04 12:05:42
2333
by 森岛帆高 @ 2019-11-04 12:18:50