Problem_LCR_104_combinationSum4.cc

#include <stdint.h>
#include <vector>

using namespace std;

// @sa https://leetcode-cn.com/problems/combination-sum-iv/
// @sa Problem_0377_combinationSum4.cc
class Solution
{
 public:
  int combinationSum4(vector<int>& nums, int target)
  {
    vector<int> dp(target + 1);
    dp[0] = 1;
    for (int i = 1; i <= target; i++)
    {
      for (int num : nums)
      {
        if (num <= i && dp[i - num] < INT32_MAX - dp[i])
        {
          dp[i] += dp[i - num];
        }
      }
    }
    return dp[target];
  }
};