题解 | #加起来和为目标值的组合(四)#

using System;
using System.Collections.Generic;


class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     *
     * @param nums int整型一维数组
     * @param target int整型
     * @return int整型
     */
    public int combination (List<int> nums, int target) {
        // write code here
        int nZHCount = 0;
        nums.Sort();
        DG(nums, target, ref nZHCount, 0);
        return nZHCount;
    }

    public void DG(List<int> nums, int target, ref int nZHCount,
                   int nCurSum) {
        // write code here
        foreach (int val in nums) {
            if (nCurSum + val > target)
                return;
            else if (nCurSum + val == target) {
                nZHCount++;
                return;
            } else
                DG(nums, target, ref nZHCount, nCurSum + val);
        }
    }
}