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class Solution { public int solution(int n) { int answer = 0; for(int i = 1; i <= n; i++) { if(i % 2 == 0) { answer += i; } } return answer; } }
class Solution { public int solution(int n) { int answer = 0; for(int i=2; i<=n; i+=2){ answer+=i; } return answer; } }
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