- [USACO20OPEN] Haircut G
1
- @ 2026-7-28 11:37:47
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int, int>
template<class T>
struct Fen {
int n;
vector<T> t;
Fen (int n_) {
init(n_);
}
Fen () {};
void init(int n_) {
n = n_;
t.assign(n + 1, {});
}
void change(int u, T x) {
for(; u <= n; u += u & -u) t[u] += x;
}
T sum(int u) {
T res = 0;
for(; u; u -= u & -u) res += t[u];
return res;
}
T sum(int l, int r) {
return sum(r) - sum(l - 1);
}
int kth(T sum) {
int i = 0;
T tot = {};
for (int j = 1 << __lg(n); j > 0; j /= 2) {
if (i + j <= n && t[i + j] + tot < sum) {
i += j;
tot += t[i];
}
}
return i + 1;
}
};
void solve() {
int n;
cin >> n;
vector<int> a(n + 1);
for (int i = 1; i <= n; i++) cin >> a[i], a[i]++;
Fen<int> t(n + 1);
vector<int> pre(n + 1);
ll ans = 0;
for (int i = 1; i <= n; i++) {
pre[i] += t.sum(a[i] + 1, n + 1);
t.change(a[i], 1);
ans += pre[i];
}
vector<ll> res(n + 2);
for (int i = 1; i <= n; i++) res[a[i]] += pre[i];
for (int i = n; i >= 0; i--) res[i] += res[i + 1];
for (auto &x : res) x = ans - x;
for (int i = 1; i <= n; i++) cout << res[i] << '\n';
}
signed main() {
ios::sync_with_stdio(0); cin.tie(0);
int t = 1;
// cin >> t;
while (t--) solve();
return 0;
}
/*
g++ -std=c++20 1.cpp -o 1 && 1 < in.txt > out.txt
*/
0 条评论
目前还没有评论...
信息
- ID
- 535
- 时间
- ms
- 内存
- MiB
- 难度
- 7
- 标签
- (无)
- 递交数
- 14
- 已通过
- 11
- 上传者