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  1. Maximum Perimeter Triangle
  2. Discussions

Maximum Perimeter Triangle

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106 Discussions

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  • elnazSalehi
     + 0 comments

    A non-degenerate triangle is one where the sum of the lengths of any two sides is greater than the length of the remaining side.

  • michael_chen_0
     + 0 comments

    Python 3 solution:

    import typing


def maximumPerimeterTriangle(
    sticks: list[int],
) -> tuple[int, int, int] | tuple[typing.Literal[-1]]:
    sticks.sort(reverse=True)
    for i in range(len(sticks) - 2):
        a, b, c = sticks[i : i + 3]
        if a < b + c:
            return c, b, a
    return (-1,)

  • hiranyag_singh
     + 0 comments

    Python 3 Solun:

    def maximumPerimeterTriangle(sticks):
    sticks.sort()
    for i in range(len(sticks) - 3, -1, -1):
        if sticks[i] + sticks[i+1] > sticks[i+2]:
            return [sticks[i], sticks[i+1], sticks[i+2]]
    return [-1]

  • outsider973
     + 0 comments

    Awesome rust solution ;)

    fn maximumPerimeterTriangle(mut sticks: Vec<i32>) -> Vec<i32> {
    sticks.sort();
    
    sticks
        .windows(3)
        .filter(|&window| window[0] + window[1] > window[2])
        .max_by_key(|&window| (window.iter().sum::<i32>(), window.iter().min().unwrap()))
        .unwrap_or(&[-1])
        .to_vec()
}

  • andycherney58
     + 0 comments

    Two pointer technique

    def maximumPerimeterTriangle(sticks): 

    n = len(sticks)
sticks.sort()
possible_triangles = []
for i in range(n - 1, 1, -1):
    left = 0
    right = i - 1
    while left < right:
        if sticks[left] + sticks[right] > sticks[i]:
            for k in range(left, right):
                possible_triangles.append((sticks[k], sticks[right], sticks[i]))
            right -= 1
        else:
            left += 1

if not possible_triangles:
    return [-1]
return max(possible_triangles, key=lambda x: sum(x))