Compilare: user.cpp: In function ‘void Hadd(long int)’: user.cpp:12:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<h[x%MOD].size();i++) ^ user.cpp: In function ‘void Hdel(long int)’: user.cpp:20:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<h[x%MOD].size();i++) ^ user.cpp: In function ‘bool Hquery(long int)’: user.cpp:27:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<h[x%MOD].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:47:37: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%ld\n",Hquery(x)); ^ user.cpp:35:37: 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:36:39: 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:38:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&n); ^ user.cpp:41:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld%ld",&t,&x); ^