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Minimum increment in the sides required to get non-negative area of a triangle
• Difficulty Level : Easy
• Last Updated : 26 Oct, 2018

Given three sides of the triangle, find the minimum increase in the length of the side of the triangle to make the area of the triangle non-negative.

Examples:

Input: a = 3, b = 4, c = 10
Output: 3
With the given sides, the area is negative.
If a is increased to 5 and b to 5, then the area becomes 0, which is not negative.

Input: a = 6, b = 6, c = 10
Output: 2

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Approach: Since the area of any triangle is non-negative if the sum of the smallest two sides is always greater than or equal to the third side, hence the following steps should be followed to solve the above problem:

• Sort the three sides in increasing order.
• Check if the sum of the first two sides is greater than or equal to the third side, if it is, then the answer is 0.
• If it is not, then the answer will be (third side – (first side + second side)).

Below is the implementation of the given approach.

## C++

 `// C++ program to find Minimum``// increase in sides to get``// non-negative area of a triangle``#include ``using` `namespace` `std;`` ` `// Function to return the minimum increase in side``// lengths of the triangle``int` `minimumIncrease(``int` `a, ``int` `b, ``int` `c)``{``    ``// push the three sides to a array``    ``int` `arr[] = { a, b, c };`` ` `    ``// sort the array``    ``sort(arr, arr + 3);`` ` `    ``// check if sum is greater than third side``    ``if` `(arr + arr >= arr)``        ``return` `0;``    ``else``        ``return` `arr - (arr + arr);``}`` ` `// Driver Code``int` `main()``{``    ``int` `a = 3, b = 5, c = 10;`` ` `    ``cout << minimumIncrease(a, b, c);`` ` `    ``return` `0;``}`

## Java

 `// Java Program to find Minimum ``// increment in the sides required ``// to get non-negative area of ``// a triangle``import` `java.util.*;``class` `GFG``{ ``static` `int` `minimumIncrease(``int` `a, ``int` `b,``                           ``int` `c)``{``    ``// push the three sides ``    ``// to a array``    ``int` `arr[] = { a, b, c };`` ` `    ``// sort the array``    ``Arrays.sort(arr);`` ` `    ``// check if sum is greater``    ``// than third side``    ``if` `(arr[``0``] + arr[``1``] >= arr[``2``])``        ``return` `0``;``    ``else``        ``return` `arr[``2``] - (arr[``0``] + arr[``1``]);``}`` ` `// Driver Code``public` `static` `void` `main (String[] args) ``{``    ``int` `a = ``3``, b = ``5``, c = ``10``;`` ` `    ``System.out.println(minimumIncrease(a, b, c));``}``}`` ` `// This code is contributed``// by Shashank`

## Python 3

 `# Python program to find Minimum ``# increase in sides to get ``# non-negative area of a triangle `` ` `# Function to return the ``# minimum increase in side ``# lengths of the triangle ``def` `minimumIncrease(a, b, c) :`` ` `    ``# push the three sides``    ``# to a array ``    ``arr ``=` `[ a, b, c ]`` ` `    ``# sort the array ``    ``arr.sort()`` ` `    ``# check if sum is greater``    ``# than third side``    ``if` `arr[``0``] ``+` `arr[``1``] >``=` `arr[``2``] :``        ``return` `0`` ` `    ``else` `:``        ``return` `arr[``2``] ``-` `(arr[``0``] ``+` `arr[``1``])`` ` `# Driver code     ``if` `__name__ ``=``=` `"__main__"` `:`` ` `    ``a, b, c ``=` `3``, ``5``, ``10``    ``print``(minimumIncrease(a, b, c))`` ` `# This code is contributed``# by ANKITRAI1`

## C#

 `// C# Program to find Minimum ``// increment in the sides required ``// to get non-negative area of ``// a triangle``using` `System;`` ` `class` `GFG``{ ``static` `int` `minimumIncrease(``int` `a, ``int` `b,``                           ``int` `c)``{``    ``// push the three sides ``    ``// to a array``    ``int``[] arr = { a, b, c };`` ` `    ``// sort the array``    ``Array.Sort(arr);`` ` `    ``// check if sum is greater``    ``// than third side``    ``if` `(arr + arr >= arr)``        ``return` `0;``    ``else``        ``return` `arr - (arr + arr);``}`` ` `// Driver Code``public` `static` `void` `Main () ``{``    ``int` `a = 3, b = 5, c = 10;`` ` `    ``Console.Write(minimumIncrease(a, b, c));``}``}`` ` `// This code is contributed ``// by ChitraNayal`

## PHP

 `= ``\$arr``)``        ``return` `0;``    ``else``        ``return` `\$arr`` - (``\$arr`` + ``\$arr``);``}`` ` `// Driver Code``\$a` `= 3;``\$b` `= 5;``\$c` `= 10;`` ` `echo` `minimumIncrease(``\$a``, ``\$b``, ``\$c``);`` ` `// This code is contributed``// by ChitraNayal``?>`
Output:
```2
``` My Personal Notes arrow_drop_up