题解 | #称砝码#

import java.util.Scanner

fun main(args: Array<String>) {
    val read = Scanner(System.`in`)
    val res = read.nextLine().toInt()
    val ws = read.nextLine().split(' ').filter { 
        it.isNotBlank() 
        }.map {
        it.toInt()
    }
    val nums = read.nextLine().split(' ').filter { 
        it.isNotBlank() 
        }.map {
        it.toInt()
    }
    var counts = mutableSetOf(0)
    ws.forEachIndexed { index, w ->
        for ( i in 0 until  nums[index]) {
            val copy = mutableSetOf<Int>()
            counts.forEach {
                copy.add(it)
                copy.add(it + w)

            }
            counts = copy
        }
    }
    println(counts.size)
}