377. 组合总和 Ⅳ

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
class Solution {
public int combinationSum4(int[] nums, int target) {
int[] dp = new int[target+1];
// 初始化dp
for(int num : nums){
if(num <= target){
dp[num] = 1;
}
}
dp[0] = 1;

for(int i = 1; i <= target; i++){
int count = 0;
for(int num : nums){
if(i - num >=0 ){
count += dp[i - num];
}
}
dp[i] = Math.max(dp[i], count);
}
return dp[target];
}
}