Compilare: user.cpp: In function ‘void insertElement(int)’: user.cpp:11:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v[q].size(); i++) ^ user.cpp: In function ‘bool isInSet(int)’: user.cpp:20:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0 ; i < v[q].size() ; i++) ^ user.cpp: In function ‘int main()’: user.cpp:41:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in", "r", stdin); ^ user.cpp:42:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out", "w", stdout); ^ user.cpp:43:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &k); ^ user.cpp:46:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &a, &b); ^