[Algorithm] 29 week(8.08 ~ 8.14) 2/3

2367. Number of Arithmetic Triplets

var arithmeticTriplets = function(nums, diff) {
    let count = 0;
    
    for(let i = 0; i < nums.length - 2; i++){
        for(let j = i + 1; j < nums.length - 1; j++){
            for(let k = j + 1; k < nums.length; k++){
                if(nums[j] - nums[i] === diff && nums[k] - nums[j] === diff){
                    count += 1;
                }
            }
        }
    }
    
    return count;
};