rl544
33 lines
969 B
Java
33 lines
969 B
Java
// [문제 링크]: https://school.programmers.co.kr/learn/courses/30/lessons/134239
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import java.util.ArrayList;
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import java.util.stream.*;
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class Solution {
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private double cal(double[] ar, int[] ra){
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double ans = 0D;
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if(ra[0]>ar.length+ra[1]-1){
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return -1;
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}
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for(int a = ra[0]; a < ar.length+ra[1]-1; a++) ans +=(ar[a+1]+ar[a])/2;
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return ans;
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}
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public double[] solution(int y, int[][] ranges) {
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double[] ans, answer = new double[ranges.length];
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int i = 0;
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double k = y;
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ArrayList<Double> test = new ArrayList();
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while(k>1){
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test.add(k);
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if(k%2==0) k = k/2;
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else k= 3*k+1;
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i++;
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}
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test.add(k);
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ans = test.stream().mapToDouble(x -> x).toArray();
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for(int c = 0; c < ranges.length; c++){
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answer[c] = cal(ans,ranges[c]);
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}
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return answer;
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}
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} |