Compilare: user.cpp: In function ‘void finish(int, int)’: user.cpp:97:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<fii[nod].size (); i++) ^ user.cpp:108:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<fii[nod].size (); i++) ^ user.cpp: In function ‘int main()’: user.cpp:139:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("treemis.in", "r", stdin); ^ user.cpp:140:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("treemis.out", "w", stdout); ^ user.cpp: In function ‘void Next()’: user.cpp:174:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread (sir, 1, maxl, stdin), pos = 0; ^