[프로그래머스] 소수 만들기

class Solution {
    public int solution(int[] nums) {
        int answer = 0;
        
        for(int i=0; i<nums.length; i++){
            for(int j= i+1; j<nums.length; j++){
                for(int k = j+1; k<nums.length; k++){
                    int sum = nums[i] + nums[j] + nums[k];
                    if(isCheck(sum)){
                        answer++;
                    }
                }
            }
        }

        return answer;
    }
    
    static boolean isCheck(int number){
        if(number<=1) return false;
        for(int i=2; i*i<=number; i++){
            if(number%i == 0){
                return false;
            }
        }
        
        return true;
        
    }
}