Lab3

// Lab3
// Problem 1
import java.util.Scanner;
class Problem1{
    public static void main(Strings args[]){
        Scanner sc=new Scanner(System.in);
        int num=sc.nextInt();
        int remainder=0;
        while(num>0){
            remainder=remainder*10+(num%10);
            num/=10;
        }
        System.out.print(remainder);
    }
}
// Problem 2
import java.util.Scanner;
class Problem2{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        int num=sc.nextInt();
        int remainder=0, output=0;
        int power=1;
        while (num>0){
            remainder=num%2;
            output+=remainder*power;
            num/=2;
            power*=10;
        }
        System.out.print(output);
    }
}
// Problem 3
import java.util.Scanner;
class Problem3{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        int num=sc.nextInt();
        int power=1, output=0;
        for (int i=0; i<6; i++){
            output+=(num%10)*power;
            power*=2;
            num/=10;
        }
        System.out.print(output);
    }
}
// Problem 4 (using toLowerCase())
import java.util.Scanner;
class Problem4{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        String s=sc.nextLine();
        String t=s.toLowerCase();
        System.out.print(t);
    }
}
// Problem 4 (using type conversion)
import java.util.Scanner;
class Problem4ew{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        String s=sc.nextLine();
        char c;
        String output="";
        for (int i=0; i<s.length(); i++){
            c=(char)((int)(s.charAt(i)+32));
            output=output+c;
        }
        System.out.println(output);
    }
}
// Problem 5
import java.util.Scanner;
class Problem5{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        String s=sc.nextLine();
        int num=s.length()/2, e=0;
        for (int i=0; i<num; i++){
            if (s.charAt(i)!=s.charAt(s.length()-i-1)){
                e++;
            }
        }
        if (e==0){
            System.out.print("Is a palindrome");
        }
        else {
            System.out.print("Is not a palindrome");
        }
    }
}
// Problem 6(i)
import java.util.Scanner;
class Problem6i{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        int num=sc.nextInt();
        int prod=1;
        for (int i=2; i<=num; i++){
            prod*=i;
        }
        System.out.print(prod);
    }
}
// Problem 6(ii)
import java.util.Scanner;
class Problem6ii{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        int num=sc.nextInt();
        int prod=1, i=1;
        while(num-->0){
            prod*=i;
            i++;
        }
        System.out.print(prod);
    }
}
// Problem 6(iii)
import java.util.Scanner;
class Problem6iii{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        int num=sc.nextInt();
        int prod=1, i=1;
        do {
            prod*=i;
            i++;
        } while(num-->1);
        System.out.print(prod);
    }
}
// Problem 7
import java.util.Scanner;
class Problem7{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        int num1=sc.nextInt();
        int num2=sc.nextInt();
        int num3=sc.nextInt();
        int max=(num1>num2)?((num1>num3)?num1:num3):((num2>num3)?num2:num3);
        System.out.print(max);
    }
}
// Problem 8
import java.util.Scanner;
class Problem8{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        int num=sc.nextInt();
        int a[]=new int[num];
        for (int i=0; i<num; i++){
            a[i]=sc.nextInt();
        }
        int z=0;
        for (int i=0; i<num/2; i++){
            z=a[i];
            a[i]=a[num-1-i];
            a[num-1-i]=z;
        }
        for (int i=0; i<num; i++){
            System.out.print(a[i] + " ");
        }
    }
}
// Problem 9
import java.util.Scanner;
class Problem9{
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int a[][]=new int[n][n];
        for (int i=0; i<n; i++){
            for (int j=0; j<n; j++){
                a[i][j]=sc.nextInt();
            }
        }
        int e=0;
        for (int i=0; i<n; i++){
            for (int j=0; j<i; j++){
                if (a[i][j]!=0){
                    e=1;
                }
            }
        }
        if (e==0){
            System.out.print("Given matrix is upper triangular");
        }
        else {
            System.out.print("Given matrix is not upper tringular");
        }
    }
}