Compilare: user.cpp: In function ‘int main()’: user.cpp:71:20: warning: integer overflow in expression [-Woverflow] int e=-1+(1<<31); ^ user.cpp:82:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(dr+1<=n && v[dr+1]-v[i]<=m) ^ user.cpp:84:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(v[i]-v[st+1]>m) ^ user.cpp:79:13: warning: unused variable ‘sz’ [-Wunused-variable] int sz=0; ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:13:38: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^