LeetCode - 2475. Number of Unequal Triplets in Array

Solution

var unequalTriplets = function(nums) {
    let res = 0

    for(let i=0; i<nums.length; i++) {
        for(let j=i+1; j<nums.length; j++) {
            for(let k=j+1; k<nums.length; k++) {
                if(nums[i] !== nums[j] && nums[i] !== nums[k] && nums[j] !== nums[k]) res++
            }
        }
    }

    return res
};

Explanation