Compilare: user.cpp: In function ‘int getLabel(const std::vector<int>&)’: user.cpp:42:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i + 1 < state.size(); ++ i) ^ user.cpp: In function ‘int main()’: user.cpp:80:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < l.size(); ++ i) ^ user.cpp:85:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < l.size(); ++ i) ^ user.cpp:71:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("matrice6.in", "r", stdin); ^ user.cpp:72:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("matrice6.out", "w", stdout); ^