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CodeShef/Beginner/AddTwoNumbers.java

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+package Beginner;
+
+// The first line contains an integer T, the total number of test cases. Then follow T lines, each line contains two Integers A and B.
+import java.util.*;
+class AddTwoNumbers  {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int a = sc.nextInt();//Enter number of inputs
+        int n1 = 0;
+        int n2 = 0;
+
+        int i = 1;
+        int j =0;
+        while (i<=a) {
+
+            while (j<=2) {
+                n1 = sc.nextInt();//enter first number
+                n2 = sc.nextInt();//enter second number
+                System.out.println(n1 + n2);
+                j++;
+            }
+            i++;
+        }
+        sc.close();
+
+        }
+    }
+
+// for(int i = 1; i<=a; i++){
+        //     for(int j = 1; j<=2;j++){
+        //         n1 = sc.nextInt();
+        //         n2 = sc.nextInt();
+        //         System.out.println(n1 + n2);
+
+        //     }

CodeShef/Easy Problems to Get Started/BuyPlease.java

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+// Chef went to a shop and buys a pens and b pencils. Each pen costs x units and each pencil costs y units. 
+// Now find what is the total amount Chef will spend to buy a pens and b pencils.
+import java.util.*;
+class BuyPlease {
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+        int a = sc.nextInt();
+        int b = sc.nextInt();
+        int x = sc.nextInt();
+        int y = sc.nextInt();
+        int sum = a*x + b*y;
+        System.out.println(sum);
+        sc.close();
+    }
+}

CodeShef/Easy Problems to Get Started/FactorFinding.java

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+// You are given a number N and find all the distinct factors of N.
+import java.util.*;
+class FactorFinding {
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+        int N = sc.nextInt(); // Enter N
+        int sum = 0;
+        String factors = "";
+        for(int i = 1; i<=N; i++){
+            if(N%i == 0){
+                sum++;
+                //System.out.print(i +" ");
+                factors +=(i + " ");
+            }
+        }
+        // number of factor found
+        System.out.println(sum);
+        System.out.println(factors);
+        sc.close();
+    }
+}
+// completed

CodeShef/Easy Problems to Get Started/IsBothOrNot.java

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+// You're given a number N. If N is divisible by 5 or 11 but not both then print "ONE"(without quotes). 
+// If N is divisible by both 5 and 11 then print "BOTH"(without quotes). If N is not divisible by 5 or 11 then print "NONE"(without quotes).
+import java.util.*;
+class IsBothOrNot {
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+        int N = sc.nextInt();
+        if(N%5 == 0 && N%11 == 0){
+            System.out.println("BOTH");
+        }else if(N%5 == 0 || N % 11 == 0){
+            System.out.println("ONE");
+        }else{
+            System.out.println("NONE");
+        }
+        sc.close();
+    }
+}

CodeShef/Easy Problems to Get Started/addNaturalNumbers.java

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+//You are given a number N. Find the sum of all numbers from 1 to N.
+import java.util.*;
+class addNaturalNumbers {
+    public static void main(String[] args) {
+
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();//enter n 
+        int a = 0;
+        int i = 1;
+        // for(int i = 1; i<=n;i++){
+        //     a=a+i;//a will be keep on adding until loop ends
+        // }
+        // System.out.println(a);
+        while (i<=n) {
+            a =a +i;
+            i = i+1;
+        }
+        System.out.println(a);
+        sc.close();
+    }    
+}
+//complete

CodeShef/Easy Problems to Get Started/alternativeSquare.java

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+// You're given a number N. Print the first N lines of the below-given pattern.
+
+// 1 2 3 4 5
+// 10 9 8 7 6
+// 11 12 13 14 15
+// 20 19 18 17 16
+// 21 22 23 24 25
+// 30 29 28 27 26
+import java.util.*;
+class alternativeSquare {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();
+        int count = 0;
+        for(int i = 1; i<=n; i++){
+            if(i%2 != 0 ){
+            for(int j = 1;j<=5; j++){
+                count = count + 1;
+                System.out.print(count + " ");
+            }
+        }else {
+            int temp = count+1;
+            for(int j = count+5; j>=temp; j--){
+                count = count + 1;
+                System.out.print(j +" ");
+            }
+        }
+        System.out.println();
+        }
+        sc.close();
+    }
+}
+//complete

CodeShef/Easy Problems to Get Started/findMe.java

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+//You are given a list of N integers and a value K. Print 1 if K exists in the given list of N integers, otherwise print −1.
+import java.util.*;
+class findMe {
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();// enter size
+        int k = sc.nextInt();//enter number to find
+        int integers[] = new int[n];
+        String answer = "";
+        String notanswer = "";
+        for(int i = 0; i<n; i++){
+            integers[i] = sc.nextInt();// enter data
+            if(integers[i]==k){
+                answer = "1";
+            }else {
+                notanswer = "-1";
+            }
+        }
+        if(answer == "1"){
+            System.out.println(answer);
+        }
+        if(answer !="1"){
+            System.out.println(notanswer);
+        }
+        sc.close();
+    }
+}
+// complete

CodeShef/Easy Problems to Get Started/rajuTrip.java

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+//Raju is planning to visit his favourite restaurant. He shall travel to it by bus. 
+//Only the buses whose numbers are divisible by 5 or by 6 shall take him to his destination.
+// You are given a bus number N. Find if Raju can take the bus or not. Print YES if he can take the bus, otherwise print NO
+import java.util.*;
+class rajuTrip {
+    public static void main(String argsp[]){
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();
+        if(n%5 == 0 || n%6 == 0){
+            System.out.println("YES");
+        }else{
+            System.out.println("NO");
+        }
+        sc.close();
+    }
+}
+// complete

CodeShef/Easy Problems to Get Started/rangeOdd.java

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+// You're given two numbers L and R.
+//  Print all odd numbers between L and R (both inclusive) in a single line separated by space, in ascending (increasing) order.
+import java.util.*;
+class rangeOdd{
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+        int l = sc.nextInt();
+        int r = sc.nextInt();
+        for(int i = l; i<=r; i++){
+            if(i%2 != 0){
+                System.out.println(i);
+            }
+        }
+        sc.close();
+    }
+}

CodeShef/Easy Problems to Get Started/reverseMe.java

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+// You are given a list of N integers and you need to reverse it and print the reversed list in a new line
+import java.util.*;
+class reverseMe {
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();// enter size
+        int integers[] = new int[n];
+        for(int i = 0; i<n; i++){
+            integers[i] = sc.nextInt();// enter data
+        }
+        for(int i = n-1; i>=0; i--){
+            System.out.print(integers[i] + " ");
+        }
+        sc.close();
+    }
+}
+// complete

CodeShef/Easy Problems to Get Started/reverseStarPattern.java

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+// You're given a number N. Print the first N lines of the below-given pattern.
+
+//     *
+//    **
+//   ***
+//  ****
+// *****
+import java.util.*;
+class reverseStarPattern {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int n = sc.nextInt();
+        for(int i=1; i<=n; i++){
+            for(int j = n-i; j>=1; j--){
+                System.out.print(" ");
+            }
+            for(int j = 1;j<=i;j++){
+                System.out.print("*");
+            }
+            System.out.println();
+        }
+        sc.close();
+    }
+}

CodeShef/Easy Problems to Get Started/secondLargest.java

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+// Given three distinct integers A, B and C, print the second largest number among them.
+import java.util.*;
+class secondLargest {
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+        int a = sc.nextInt();
+        int b = sc.nextInt();
+        int c = sc.nextInt();
+        if(a>b && b>c){// a=3 b=2 c=1
+            System.out.println(b);
+        }else if(c>b && b>a){ // a=1 b=2 c=3
+            System.out.println(b);
+        }else if(a>c && c>b){ // a= 3 b=1 c= 2
+            System.out.println(c);
+        }else if(b>c && c>a){ //a =1 b=3 c=2 
+            System.out.println(c);
+        }else if(c>a && a>b){// a =2 b=1 c= 3
+            System.out.println(a);
+        }else if(b>a && a>c){// a=2 b=3 c=1
+            System.out.println(a);
+        }
+    sc.close();
+    }
+}

CodeShef/Easy Problems to Get Started/triangleEverywhere.java

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+//You're given the length of three sides a, b, and c respectively
+//Now If these three sides can form an Equilateral Triangle then print 1,
+// if these three sides can form an Isosceles Triangle then print 2,
+// if these three sides can form a Scalene Triangle then print 3, otherwise print −1.
+import java.util.*;
+class triangleEverywhere {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        double a = sc.nextInt();
+        double b = sc.nextInt();
+        double c = sc.nextInt();
+        double s = (a+b+c)/2;
+        double area = s*(s-a)*(s-b)*(s-c);
+        area = Math.sqrt(area);
+        if(area>0){
+            if(a==b&&b==c){
+                System.out.println("1");
+            }else if(a==b&&b!=c){
+                System.out.println("2");
+            }else if(a==c&&c!=a){
+                System.out.println("2");
+            }else if(b==c&&a!=c){
+                System.out.println("2");
+            }else if(a!=b&&b!=c){
+                System.out.println("3");
+            }
+        }
+        else{
+            System.out.println("-1");
+        }
+        sc.close();
+    }
+}
+//complete

CodeShef/Easy Problems to Get Started/validAngleTriangle.java

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+//You're given the three angles a, b, and c respectively.
+// Now check if these three angles can form a valid triangle with an area greater than 0 or not.
+// Print "YES"(without quotes) if it can form a valid triangle with an area greater than 0, otherwise print "NO" (without quotes).
+import java.util.*;
+class validAngleTriangle {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int a = sc.nextInt();
+        int b = sc.nextInt();
+        int c = sc.nextInt();
+        int sum = a+b+c;
+        if(sum == 180){
+            }else{
+            System.out.println("NO");
+        }
+        sc.close();
+    }
+}

CodeShef/Easy Problems to Get Started/validTriangle.java

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+//You're given the length of three sides a, b, and c respectively. 
+//Now check if these three sides can form a triangle or not.
+//Print "YES"(without quotes) if it can form a valid triangle with an area greater than 0, otherwise print "NO" (without quotes).
+import java.util.*;
+class validTriangle{
+    public static void main(String args[]){
+        Scanner sc = new Scanner(System.in);
+        double a = sc.nextInt();
+        double b = sc.nextInt();
+        double c = sc.nextInt();
+        double s = (a+b+c)/2;
+        double area = (s*(s-a)*(s-b)*(s-c));
+        area = Math.sqrt(area);
+        if(area>0){
+            System.out.println("YES");
+        }else{
+            System.out.println("NO");
+        }
+    sc.close();
+    }
+}
+//complete

CodeShef/INTRDSGN.java

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+import java.util.*;
+public class INTRDSGN {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int T = sc.nextInt();
+        for (int i = 0; i < T; i++) {
+            int x1 = sc.nextInt();
+            int y1 = sc.nextInt();
+            int x2 = sc.nextInt();
+            int y2 = sc.nextInt();
+            int sum1 = x1+y1;
+            int sum2 = x2+y2;
+            if(sum1<=sum2){
+                System.out.println(sum1);
+            }else{
+                System.out.println(sum2);
+            }
+        }
+        sc.close();
+    }
+}