class Vec{
	static add(first: List, second: List){
		var count = first.count.min(second.count)
		var result = []
		for(i in 0...count){
			result.add(first[i] + second[i])
		}
		return result
	}

	static sub(first: List, second: List){
		var count = first.count.min(second.count)
		var result = []
		for(i in 0...count){
			result.add(first[i] - second[i])
		}
		return result
	}

	static mul(first: List, second: Any){
		if(first is Num && second is List) return mul(second, first)
		var secondNum = second is Num
		var count = secondNum ? first.count : (first.count.min(second.count))
		var result = []
		for(i in 0...count){
			result.add(first[i] * (secondNum?second:second[i]))
		}
		return result
	}

	static div(first: List, second: Any){
		var secondNum = second is Num
		var count = secondNum ? first.count : first.count.min(second.count)
		var result = []
		for(i in 0...count){
			result.add(first[i] / secondNum?second:second[i])
		}
		return result
	}

	static approximately(first, second){
		if(!(first is List) || !(second is List)) return false
		if(first.count != second.count) return false
		var count = first.count
		if(count < 1) return true
		if((first[0] - second[0]).abs > 0.001) return false
		if(count < 2) return true
		if((first[1] - second[1]).abs > 0.001) return false
		if(count < 3) return true
		if((first[2] - second[2]).abs > 0.001) return false
		if(count < 4) return true
		if((first[3] - second[3]).abs > 0.001) return false
		return true
	}
}