#include <vector>
#include <algorithm>

/**
 * 1051. Height Checker
 * A school is trying to take an annual photo of all the students. The students are asked to stand in a single file line in non-decreasing order by height. Let this ordering be represented by the integer array expected where expected[i] is the expected height of the ith student in line.
 * You are given an integer array heights representing the current order that the students are standing in. Each heights[i] is the height of the ith student in line (0-indexed).
 * Return the number of indices where heights[i] != expected[i].
 */

class Solution {
public:
	static int heightChecker(const std::vector<int>& h) {
		auto x = h;
		std::stable_sort(x.begin(), x.end());
		int ret = 0;
		for (int i = 0; i < x.size(); ++i)
			ret += (x[i] != h[i]);
		return ret;
	}
};