题解 | 【模板】滑动窗口

#include <iostream>
#include <map>

using namespace std;

int main() {
	int n, k;
	cin >> n >> k;
	int* a = new int[n]; 
	map<int, int, greater<int> > nums;
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	for (int i = 0; i < n; i++) {
		if (i < k) {
			nums[a[i]]++;
			if (i == k - 1) {
				cout << nums.begin() -> first << " "; 
			}
		} else {
			nums[a[i]]++;
			nums[a[i - k]]--;
			if (!nums[a[i - k]]) nums.erase(a[i - k]);
			cout << nums.begin() -> first << " "; 
		}
	}
}