# 2894. Divisible and Non-divisible Sums Difference
[2894. Divisible and Non-divisible Sums Difference](https://leetcode.com/problems/divisible-and-non-divisible-sums-difference/) (<font color="#00AF9B"> Easy</font> 通過率: 89.0%)

## 限制條件
<ul>
<li>1 <= n, m <= 1000</li>
</ul>

### 解法 1
照著題意解就好

- 時間複雜度: O(n)
- 空間複雜度: O(1)

class Solution {
public:
    int differenceOfSums(int n, int m) {
        int num1 = 0, num2 = 0;
        for (int i = 1; i <= n; i++) {
            if (i % m)
                num1 += i;
            else
                num2 += i;
        }
        return num1 - num2;
    }
};