Submission #1253887

#	Time	Username	Problem	Language	Result	Execution time	Memory
1253887		Jer	Mountains (NOI20_mountains)	C++20	64 / 100	157 ms	580 KiB

Mountains

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
const int MAXN = 1e4 + 5;

ll h[MAXN];
int a[MAXN], n;

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);

	cin >> n;
	for (int i = 0; i < n; i++) cin >> h[i];

	for (int i = 0; i < n; i++)
		for (int j = i + 1; j < n; j++)
			a[i] += (h[i] > h[j]);

	ll res = 0;	
	for (int i = 0; i < n; i++)
		for (int j = i + 1; j < n; j++)
			if (h[j] > h[i]) res += (ll)a[j];

	cout << res << '\n';

	return 0;
}

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 9
• Subtask 4: 36 / 36
• Subtask 5: 28 / 28
• Subtask 6: 0 / 9
• Subtask 7: 0 / 12