Submission #1181695

#	Time	Username	Problem	Language	Result	Execution time	Memory
1181695		mehmetkagan	Mountains (NOI20_mountains)	C++20	64 / 100	2097 ms	16708 KiB

Mountains

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define int ll

int32_t main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n;
    cin >> n;
    vector<int> h(n);
    for (int &x : h) cin >> x;

    multiset<int> right(h.begin(), h.end()), left;
    int ans = 0;

    for (int i = 0; i < n; ++i) {
        right.erase(right.find(h[i]));

        int l = distance(left.begin(), left.lower_bound(h[i]));
        int r = distance(right.begin(), right.lower_bound(h[i]));
        ans += l * r;

        left.insert(h[i]);
    }

    cout << ans << '\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