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Description
牛客网 2018校招真题 疯狂队列
Solving Ideas
贪心,数组排序后,交叉地将最小元素和最大元素插入到疯狂队列中,使疯狂队列向两边扩展。
Solution
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
/**
* @author wylu
*/
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
int n = Integer.parseInt(br.readLine());
int[] h = new int[n];
String[] strs = br.readLine().split(" ");
for (int i = 0; i < n; i++) {
h[i] = Integer.parseInt(strs[i]);
}
Arrays.sort(h);
int min = h[0], max = h[n - 1];
int sum = max - min;
int i = 1, j = n - 2;
while (i < j) {
sum += max - h[i];
sum += h[j] - min;
min = h[i++];
max = h[j--];
}
sum += Math.max(h[j] - min, max - h[i]);
System.out.println(sum);
}
}