Adding all HackerEarth and HackerRank Solution to github.

A-team/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

A-team/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>A-team</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

A-team/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.7
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.7

A-team/src/TestClass.java

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+import java.awt.geom.Line2D;
+import java.util.Scanner;
+
+
+public class TestClass {
+public static void main(String[] args) {
+	Scanner sc = new Scanner(System.in);
+	int T = sc.nextInt();
+	int x1 = 0,y1=0,x2=0,y2=0,Xc=0,Yc=0;
+	for(int i=0;i<T;i++){
+		x1 = sc.nextInt();
+		y1 = sc.nextInt();
+		x2 = sc.nextInt();
+		y2 = sc.nextInt();
+		Xc = sc.nextInt();
+		Yc = sc.nextInt();
+		Line2D line1 = new Line2D.Float(x1, y1, x2, y2);
+		Line2D line2 = new Line2D.Float(0, 0, Xc, Yc);
+		if(line1.intersectsLine(line2)){
+			System.out.println("NO");
+		}
+		else{
+			System.out.println("YES");
+		}
+	}
+
+}
+}

Abstract Classes and Interfaces/.classpath

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+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

Abstract Classes and Interfaces/.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>Abstract Classes and Interfaces</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

Abstract Classes and Interfaces/.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.7
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.7

Abstract Classes and Interfaces/src/Retailer1.java

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+
+public class Retailer1 extends Wholeseller{
+
+	@Override
+	void sellErasers() {
+		// TODO Auto-generated method stub
+		System.out.println("pucahsing 34 eraseres");
+	}
+
+	@Override
+	void sellPencils() {
+		// TODO Auto-generated method stub
+		System.out.println("purchasing 34 pencils");
+	}
+
+}

Abstract Classes and Interfaces/src/Retailer2.java

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+
+public class Retailer2 implements Wholeseller1{
+
+	@Override
+	public void sellbooks() {
+		// TODO Auto-generated method stub
+		System.out.println("I am purchasing books of class 9th");
+	}
+
+	@Override
+	public void sellpencils() {
+		// TODO Auto-generated method stub
+		System.out.println("purchasing 10 pencils");
+	}
+
+	@Override
+	public void sellerasers() {
+		// TODO Auto-generated method stub
+		System.out.println("purchasing 15 eraseres");
+	}
+
+}

Abstract Classes and Interfaces/src/Solution.java

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+import java.util.Dictionary;
+
+public class Solution {
+	public final static int i=0;
+	public static void main(String[] args) throws Exception  {
+		Retailer1 r1 = new Retailer1();
+		Retailer2 r2 = new Retailer2();
+		i = i+1;
+		r1.sellErasers();r1.sellPencils();r1.sellXbooks();
+		r2.sellbooks();r2.sellerasers();r2.sellpencils();
+		System.out.println();;
+
+	}
+
+
+}
+

Abstract Classes and Interfaces/src/Wholeseller.java

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+
+public abstract class Wholeseller {
+void sellXbooks(){
+	System.out.println("Books of class 10th sold");
+}
+abstract void sellErasers();
+abstract void sellPencils();
+
+}

Abstract Classes and Interfaces/src/Wholeseller1.java

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+
+public interface Wholeseller1 {
+void sellbooks();
+void sellpencils();
+void sellerasers();
+}