Eroare de compilare: main.cpp:7:30: error: 'std::vector<int> index' redeclared as different kind of symbol vector <int> v[maxn],a[maxn],index,low_index,on_stack,viz,con,origin; ^~~~~ In file included from /usr/include/c++/6/cstring:42:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:48, from main.cpp:1: /usr/include/string.h:477:1: note: previous declaration 'const char* index(const char*, int)' index (const char *__s, int __c) __THROW ^~~~~ main.cpp: In function 'void tarjan(int)': main.cpp:30:12: error: invalid types '<unresolved overloaded function type>[int]' for array subscript index[x]=val; ^ main.cpp:40:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<v[v[x][i]].size();j++) ~^~~~~~~~~~~~~~~~~~ main.cpp:52:15: error: invalid types '<unresolved overloaded function type>[int]' for array subscript if(index[x]==low_index[x]) ^ main.cpp: In function 'int main()': main.cpp:81:26: error: 'index' does not have class type on_stack.resize(n+1);index.resize(n+1);low_index.resize(n+1);viz.resize(n+1);origin.resize(n+1); ^~~~~ main.cpp:91:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<c[i].size();j++) ~^~~~~~~~~~~~ Non zero exit status: 1