1099. Work Scheduling Time limit: 0.5 second Memory limit: 64 MB There is certain amount of night guards that are available to protect the local junkyard from possible junk robberies. These guards need to scheduled in pairs, so that each pair guards
delphi自带的SHA1算法 uses IdHashSHA, IdGlobal; function SHA1(Input: String): String; begin with TIdHashSHA1.Create do try Result := LowerCase(HashBytesAsHex(TidBytes(Bytesof(Input)))); finally Free; end; end;