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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#394874 | #1363. Bitonic Ordering | Zuqa# | WA | 1ms | 3792kb | C++20 | 1.7kb | 2024-04-20 21:02:48 | 2024-04-20 21:02:49 |
Judging History
answer
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#define el '\n'
#define FIO ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
typedef unsigned uint;
typedef __int128 bint;
typedef long double ld;
typedef complex<ld> pt;
typedef unsigned long long ull;
template<typename T, typename X>
using hashTable = gp_hash_table<T, X>;
template<typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T>
using ordered_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
// mt19937_64 for unsigned long long
mt19937 rng(std::chrono::system_clock::now().time_since_epoch().count());
ll doWork(vector<int> &v)
{
int n = v.size();
// int n;
// cin >> n;
// vector<int> v(n);
vector<ll> suff(n);
ordered_set<int> a, b;
// for(int i = 0; i < n; i++)
// cin >> v[i];
for(int i = n - 1; i >= 0; i--)
{
suff[i] = b.size() - b.order_of_key(v[i]), b.insert(v[i]);
if(i + 1 < n)
suff[i] += suff[i + 1];
}
ll ans = 0, invA = 0;
for(int i = 0; i < n; i++)
{
invA += a.size() - a.order_of_key(v[i]);
a.insert(v[i]);
if(i + 1 < n)
ans += min(invA, suff[i + 1]);
}
return ans;
}
signed main()
{
FIO
int T = 1;
// cin >> T;
for(int i = 1; i <= T; i++)
{
int n;
cin >> n;
vector<int> v(n);
for(auto &it: v)
cin >> it;
cout << doWork(v);
}
}
Details
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Test #1:
score: 0
Wrong Answer
time: 1ms
memory: 3792kb
input:
13 39 40 32 100 13 16 15 28 27 26 25 24 23
output:
16
result:
wrong answer 1st lines differ - expected: '14', found: '16'