Compilare: user.cpp: In function ‘bool com(int)’: user.cpp:45:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(q.size()==lu) ^ user.cpp:61:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(q.size()==lu) ^ user.cpp: In function ‘int main()’: user.cpp:74:19: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[250005]’ [-Wformat=] scanf("%s",&ch); ^ user.cpp:80:19: warning: format ‘%s’ expects argument of type ‘char*’, but argument 2 has type ‘char (*)[250005]’ [-Wformat=] scanf("%s",&ch); ^ user.cpp:72:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("potriveala.in","r",stdin); ^ user.cpp:73:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("potriveala.out","w",stdout); ^ user.cpp:74:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&ch); ^ user.cpp:80:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s",&ch); ^