Eroare de compilare: user.cpp:9:16: error: ‘int index [50005]’ redeclared as different kind of symbol int index[50005], instv[50005], low[50005]; ^ In file included from /usr/include/c++/4.8/cstring:42:0, from /usr/include/i386-linux-gnu/c++/4.8/bits/stdc++.h:48, from user.cpp:1: /usr/include/string.h:482:1: error: previous declaration of ‘const char* index(const char*, int)’ index (__const char *__s, int __c) __THROW ^ user.cpp: In function ‘void tarjan(int)’: user.cpp:17:14: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript index[nod] = ++idx; ^ user.cpp:25:22: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript if(!index[nxt]) ^ user.cpp:30:26: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript else if(index[nxt] && instv[nxt]) ^ user.cpp:34:29: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript if(low[nod] == index[nod]) ^ user.cpp: In function ‘int main()’: user.cpp:67:20: error: invalid types ‘<unresolved overloaded function type>[int]’ for array subscript if(!index[i]) ^ user.cpp:71:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < scc.size(); i++, printf("\n")) ^ user.cpp:72:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < scc[i].size(); j++) ^ user.cpp:53:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ctc.in", "r", stdin); ^ user.cpp:54:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ctc.out", "w", stdout); ^ user.cpp:57:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:61:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^