Borderou de evaluare (job #417219)

Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:49:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘void umple(int)’: user.cpp:59:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp: In function ‘void citire()’: user.cpp:93:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:105:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:126:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:69:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp:70:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] user.cpp: In function ‘char next_char()’: user.cpp:21:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]