제출 #380244

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
380244		vishesh312	Vudu (COCI15_vudu)	C++17	0 / 140	1101 ms	57156 KiB

vudu

#include "bits/stdc++.h"
using namespace std;

using ll = long long;

#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using ordered_set = tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update>;

#define all(x) begin(x), end(x)
#define sz(x) (int)x.size()

const int mod = 1e9+7;

void solve(int tc) {
    int n;
    cin >> n;
    vector<pair<int, int>> v(n+1);
    for (int i = 1; i <= n; ++i) {
        cin >> v[i].first;
        v[i].second = i;
    }
    vector<int> a(n+1);
    sort(all(v));
    ll cur = 0;
    for (int i = 0; i <= n; ++i) {
        if (i) if (v[i].first == v[i-1].first) --cur;
        a[v[i].second] = cur;
        ++cur;
    }
    ll p;
    cin >> p;
    ll ans = 0;
    ordered_set s;
    s.insert(-1);
    for (int i = 1; i <= n; ++i) {
        a[i] += a[i-1]-p;
        ans += s.order_of_key(a[i]);
        s.insert(a[i]-1);
    }
    cout << ans << '\n';
}

signed main() {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    int tc = 1;
    //cin >> tc;
    for (int i = 1; i <= tc; ++i) solve(i);
    return 0;
}

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