3c perform operation in dataset

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<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">   <xs:element name="student">     <xs:complexType>       <xs:sequence>         <xs:element name="std1">           <xs:complexType>             <xs:sequence>               <xs:element type="xs:string" name="name"/>               <xs:element type="xs:byte" name="regno"/>               <xs:element type="xs:string" name="address"/>               <xs:element type="xs:short" name="phoneno"/>             </xs:sequence>           </xs:complexType>         </xs:element>   ...
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2333333

%{ #include<stdio.h> %} %% int|char|float|return { printf("\n%s=> Keywords",yytext);} #.* { printf("\n%s=>Preprocessor Directive",yytext);} printf|scanf|main { printf("\n%s=>functions",yytext);} ["][a-z]+["] { printf("\n%s=>Strings",yytext);} [[a-z]|[A-Z]][[a-z]|[A-Z]|[0-9]]+ { printf("\n%s=>Identifiers",yytext);} [0-9] { printf("\n%s=>Numbers",yytext);} "+"|"-"|"*"|"/"|"%" { printf("\n%s=>Operators",yytext);} ","|";"|"&"|"("|")"| [" ] |"{"|"}" { printf("\n%s=>Special Characters",yytext);} %% int main() { FILE *fp; fp=fopen("input.txt","r"); yyin=fp; yylex(); return 0; } int yywrap() { return 1; }
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fun.

import java.io.*; import java.net.*; public class EchoServer {     private ServerSocket server;     public EchoServer(int portnum) {         try {             server = new ServerSocket(portnum);         } catch (Exception err) {             System.out.println(err);         }     }     public void serve() {         try {             while (true) {                 Socket client = server.accept();                 BufferedReader r = new BufferedReader(new InputStreamReader(client.getInputStream()));                 PrintWriter w = new PrintWriter(client.getOutputStream(), true);                 w.println("Welcome to the Java Ec...
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