Compilare: user.cpp: In function ‘void Add(int, int, int)’: user.cpp:20:19: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] S=((1LL*X)<<20+Y)%MOD; ^ user.cpp: In function ‘bool Search(int, int, int)’: user.cpp:27:19: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] S=((1LL*X)<<20+Y)%MOD; ^ user.cpp:28:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Hash[t][S].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:67:22: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,IN); ^ user.cpp: In function ‘void Read(int&)’: user.cpp:54:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,MAX,1,IN),pos=0; ^ user.cpp:60:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,MAX,1,IN),pos=0; ^