Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:88:5: error: ‘k’ was not declared in this scope k = N - 1; ^ user.cpp:92:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < Graf[x].size(); i++) ^ user.cpp:70:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.in","r",stdin); ^ user.cpp:71:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.out","w",stdout); ^