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Main.java
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Main.java
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package com.company;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public class Main {
public static void main(String[] args) {
int[] nums = {5, 2, 6, 1};
System.out.println(countSmaller(nums));
}
public static List<Integer> countSmaller(int[] nums) {
List<Integer> right = new ArrayList<>();
Integer[] res = new Integer[nums.length];
for (int i = nums.length - 1; i >= 0; i--) {
int li = 0, hi = right.size() - 1;
while (li <= hi){
int mid = li + (hi - li) / 2;
if(right.get(mid) < nums[i])
li = mid + 1;
else
hi = mid - 1;
}
res[i] = li;
right.add(li, nums[i]);
}
return Arrays.asList(res);
}
}