Compilare: user.cpp: In function ‘void uneste(int, int)’: user.cpp:37:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < myset[tata2].size(); i++) ^ user.cpp:47:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < myset[tata1].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:59:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("meciul.in","r",stdin); ^ user.cpp:60:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("meciul.out","w",stdout); ^ user.cpp:62:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp:65:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:77:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^