package main

func numberOfArithmeticSlices(nums []int) (res int) {
	for i := 0; i < len(nums)-2; i++ {
		d := nums[i+1] - nums[i]
		for j := i + 2; j < len(nums); j++ {
			if nums[j]-nums[j-1] == d {
				res++
			} else {
				break
			}
		}
	}
	return res
}