train.cpp: In function 'void addl(int, int)':
train.cpp:17:6: error: 'tot' was not declared in this scope
17 | e[++tot].to=y;
| ^~~
train.cpp: In function 'void addll(int, int)':
train.cpp:24:4: error: 'tot' was not declared in this scope
24 | E[tot].to=y;
| ^~~
train.cpp: In function 'void dfs1(int)':
train.cpp:33:6: error: 'p' was not declared in this scope
33 | if(p[y])continue;
| ^
train.cpp:36:2: error: 'ls' was not declared in this scope; did you mean 'll'?
36 | ls.push_back(i);
| ^~
| ll
train.cpp:36:15: error: 'i' was not declared in this scope
36 | ls.push_back(i);
| ^
train.cpp: In function 'void dfs2(int, int)':
train.cpp:41:2: error: 'fr' was not declared in this scope
41 | fr[x]=p;
| ^~
train.cpp: In function 'void dfs3(int)':
train.cpp:51:2: error: 'cc' was not declared in this scope; did you mean 'c'?
51 | cc[fr[x]]=1;
| ^~
| c
train.cpp:51:5: error: 'fr' was not declared in this scope
51 | cc[fr[x]]=1;
| ^~
train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:72:3: error: 'p' was not declared in this scope
72 | p[i]=0;
| ^
train.cpp:74:7: error: 'p' was not declared in this scope
74 | if(!p[i])
| ^
train.cpp:76:10: error: 'ls' was not declared in this scope; did you mean 'll'?
76 | reverse(ls.begin(),ls.end());
| ^~
| ll
train.cpp:78:7: error: 'fr' was not declared in this scope
78 | if(!fr[ls[i]])
| ^~
train.cpp:79:17: error: 'w' was not declared in this scope
79 | dfs2(ls[i],++w);
| ^
train.cpp:82:4: error: 'cc' was not declared in this scope; did you mean 'c'?
82 | cc[fr[i]]=1;
| ^~
| c
train.cpp:82:7: error: 'fr' was not declared in this scope
82 | cc[fr[i]]=1;
| ^~
train.cpp:84:6: error: 'cc' was not declared in this scope; did you mean 'c'?
84 | if(cc[fr[i]])
| ^~
| c
train.cpp:84:9: error: 'fr' was not declared in this scope
84 | if(cc[fr[i]])
| ^~
train.cpp:86:19: error: expected primary-expression before '+=' token
86 | for(int i=1;i<=n;+=i)
| ^~
train.cpp:87:12: error: 'cc' was not declared in this scope; did you mean 'c'?
87 | ans[i-1]=cc[fr[i]];
| ^~
| c
train.cpp:87:15: error: 'fr' was not declared in this scope
87 | ans[i-1]=cc[fr[i]];
| ^~