Eroare de compilare: user.cpp:17:5: error: ‘int index’ redeclared as different kind of symbol int index; ^~~~~ In file included from /usr/include/c++/6/cstring:42:0, from /usr/include/x86_64-linux-gnu/c++/6/32/bits/stdc++.h:48, from user.cpp:1: /usr/include/string.h:477:1: note: previous declaration ‘const char* index(const char*, int)’ index (const char *__s, int __c) __THROW ^~~~~ user.cpp: In function ‘void dfs(int)’: user.cpp:20:17: error: no pre-increment operator for type d[node] = ++index; ^~~~~ user.cpp:21:17: error: cannot resolve overloaded function ‘index’ based on conversion to type ‘int’ low[node] = index; ^~~~~ user.cpp:24:10: error: no post-increment operator for type index++; ^~ user.cpp: In function ‘int main()’: user.cpp:60:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ans.size(); i++){ ~~^~~~~~~~~~~~ user.cpp:61:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < ans[i].size(); j++){ ~~^~~~~~~~~~~~~~~