Submission #1203322

#	Time	Username	Problem	Language	Result	Execution time	Memory
1203322		Hanksburger	Mountains (NOI20_mountains)	C++20	2 / 100	565 ms	23964 KiB

Mountains

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define int long long
using namespace std;
using namespace __gnu_pbds;
tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> t;
int a[300005], l[300005], n, c;
signed main()
{
    cin >> n;
    for (int i=0; i<n; i++)
    {
        cin >> a[i];
        l[i]=t.order_of_key(a[i]);
        t.insert(a[i]);
    }
    t.clear();
    for (int i=n-1; i>=0; i--)
    {
        c+=l[i]*t.order_of_key(a[i]);
        t.insert(a[i]);
    }
    cout << c;
}

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