# Check if it is possible to move from (a, 0) to (b, 0) with given jumps

• Last Updated : 20 May, 2021

Given two points, i.e. (a, 0) to (b, 0). The task is to check whether it is possible to move from (a,0) to (b,0) or not. One can move as (a, 0), (a+x, 0), (a+x+1, 0), (a, 2*x, 0), (a, 2*x+1, 0)……

Examples:

```Input: a = 3, x = 10, b = 4
Output: No

Input: a = 3, x = 2, b = 5
Output: Yes```

Approach: An answer will be possible if

1. a + n*x = b, where n is a non-negative integer.
2. a + n*x + 1 = b where n is a positive integer.

So,
(b – a) / x is an integer or (b – a – 1) / x is an integer
(b – a) % x = 0 or (b – a – 1) % x = 0

Below is the implementation of the above approach:

## C++

 `// CPP program to move form``// (a, 0) to (b, 0) with given jumps``#include ``using` `namespace` `std;` `// Function to check if it is possible``bool` `Move(``int` `a, ``int` `x, ``int` `b)``{``    ``if` `((((b - a) % x == 0) || ((b - a - 1) % x == 0) && a + 1 != b) && b >= a)``        ``return` `true``;` `    ``return` `false``;``}` `// Driver code``int` `main()``{``    ``int` `a = 3, x = 2, b = 7;` `    ``// function call``    ``if` `(Move(a, x, b))``        ``cout << ``"Yes"``;``    ``else``        ``cout << ``"No"``;``}`

## Java

 `// Java program to move form``// (a, 0) to (b, 0) with given jumps``import` `java.io.*;` `class` `GFG {` `// Function to check if it is possible``static` `boolean` `Move(``int` `a, ``int` `x, ``int` `b)``{``    ``if` `((((b - a) % x == ``0``) || ((b - a - ``1``) % x == ``0``) && a + ``1` `!= b) && b >= a)``        ``return` `true``;` `    ``return` `false``;``}` `// Driver code``    ``public` `static` `void` `main (String[] args) {``            ``int` `a = ``3``, x = ``2``, b = ``7``;` `    ``// function call``    ``if` `(Move(a, x, b))``        ``System.out.println( ``"Yes"``);``    ``else``        ``System.out.println( ``"No"``);``    ``}``}``//This code is contributed by shs..`

## Python 3

 `# Python 3 program to move form``# (a, 0) to (b, 0) with given jumps` `# Function to check if it``# is possible``def` `Move(a, x, b):` `    ``if` `((((b ``-` `a) ``%` `x ``=``=` `0``) ``or``         ``((b ``-` `a ``-` `1``) ``%` `x ``=``=` `0``) ``and``           ``a ``+` `1` `!``=` `b) ``and` `b >``=` `a):``        ``return` `True` `    ``return` `False` `# Driver code``if` `__name__ ``=``=` `"__main__"``:``    ``a ``=` `3``    ``x ``=` `2``    ``b ``=` `7` `    ``# function call``    ``if` `(Move(a, x, b)):``        ``print``(``"Yes"``)``    ``else``:``        ``print``(``"No"``)` `# This code is contributed``# by ChitraNayal`

## C#

 `// C# program to move form``// (a, 0) to (b, 0) with given jumps``using` `System;` `class` `GFG``{` `// Function to check if it is possible``static` `bool` `Move(``int` `a, ``int` `x, ``int` `b)``{``    ``if` `((((b - a) % x == 0) ||``         ``((b - a - 1) % x == 0) &&``           ``a + 1 != b) && b >= a)``        ``return` `true``;` `    ``return` `false``;``}` `// Driver code``public` `static` `void` `Main ()``{``    ``int` `a = 3, x = 2, b = 7;` `    ``// function call``    ``if` `(Move(a, x, b))``        ``Console.WriteLine( ``"Yes"``);``    ``else``        ``Console.WriteLine( ``"No"``);``}``}` `// This code is contributed``// by inder_verma`

## PHP

 `= ``\$a``)``        ``return` `true;` `    ``return` `false;``}` `// Driver code``\$a` `= 3; ``\$x` `= 2; ``\$b` `= 7;` `// function call``if` `(Move(``\$a``, ``\$x``, ``\$b``))``    ``echo` `"Yes"``;``else``    ``echo``"No"``;``    ` `// This code is contributed``// by anuj_67``?>`

## Javascript

 ``
Output:
`Yes`

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