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Ray-56 avatar Ray-56 commented on August 13, 2024
/**
 * @param {number[]} A
 * @return {number}
 */
var largestPerimeter = function(A) {
    // 假设三角形的边长满足`a≤b≤c`
    // 组成面积不为零的三角形的充分必要条件为`a+b>c`
    A.sort((a, b) => a - b);
    for (let i = A.length - 1; i >= 2; i--) {
        if (A[i - 2] + A[i - 1] > A[i]) {
            return A[i - 2] + A[i - 1] + A[i];
        }
    }
    return 0;
};

from like-algorithms.

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