📅  最后修改于: 2022-03-11 14:44:57.179000             🧑  作者: Mango
public int combinationSum4(int[] nums, int target) {
if (target == 0) {
return 1;
}
int res = 0;
for (int i = 0; i < nums.length; i++) {
if (target >= nums[i]) {
res += combinationSum4(nums, target - nums[i]);
}
}
return res;
}