3115. 质数的最大距离

题目链接：3115. 质数的最大距离

代码如下：

class Solution 
{
public:
	int maximumPrimeDifference(vector<int>& nums)
	{
		int dist = 0;
		int left, right;
		for (left = 0; left < nums.size(); left++)
		{
			if (isPrime(nums[left])) { break; }
		}
		for (right = nums.size() - 1; right >= 0; right--)
		{
			if (isPrime(nums[right])) { break; }
		}
		return right - left;
	}

private:
	bool isPrime(int num)
	{
		for (int i = 2; i * i <= num; i++)
		{
			if (num % i == 0) { return false; }
		}
		return num >= 2;
	}
};