Compilare: user.cpp: In function ‘void Add_To_Hash(int, int)’: user.cpp:14:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<h[nr%MOD].size();i++) ^ user.cpp: In function ‘int Search(int)’: user.cpp:24:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<h[nr%MOD].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:48:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<h[i].size();j++) ^ user.cpp:31:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pariuri.in","r",stdin); ^ user.cpp:32:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pariuri.out","w",stdout); ^ user.cpp:34:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ user.cpp:37:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&M); ^ user.cpp:40:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&t,&sum); ^