結果
| 問題 |
No.1282 Display Elements
|
| コンテスト | |
| ユーザー |
stoq
|
| 提出日時 | 2020-11-09 02:02:28 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 266 ms / 2,000 ms |
| コード長 | 3,498 bytes |
| コンパイル時間 | 2,306 ms |
| コンパイル使用メモリ | 207,380 KB |
| 最終ジャッジ日時 | 2025-01-15 21:48:56 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 24 |
ソースコード
#define MOD_TYPE 1
#pragma region Macros
#include <bits/stdc++.h>
using namespace std;
#if 0
#include <boost/multiprecision/cpp_int.hpp>
#include <boost/multiprecision/cpp_dec_float.hpp>
using Int = boost::multiprecision::cpp_int;
using lld = boost::multiprecision::cpp_dec_float_100;
#endif
#if 0
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#endif
using ll = long long int;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;
template <typename Q_type>
using smaller_queue = priority_queue<Q_type, vector<Q_type>, greater<Q_type>>;
constexpr ll MOD = (MOD_TYPE == 1 ? (ll)(1e9 + 7) : 998244353);
constexpr int INF = (int)1e9 + 10;
constexpr ll LINF = (ll)4e18;
constexpr double PI = acos(-1.0);
constexpr double EPS = 1e-7;
constexpr int Dx[] = {0, 0, -1, 1, -1, 1, -1, 1, 0};
constexpr int Dy[] = {1, -1, 0, 0, -1, -1, 1, 1, 0};
#define REP(i, m, n) for (ll i = m; i < (ll)(n); ++i)
#define rep(i, n) REP(i, 0, n)
#define REPI(i, m, n) for (int i = m; i < (int)(n); ++i)
#define repi(i, n) REPI(i, 0, n)
#define MP make_pair
#define MT make_tuple
#define YES(n) cout << ((n) ? "YES" : "NO") << "\n"
#define Yes(n) cout << ((n) ? "Yes" : "No") << "\n"
#define possible(n) cout << ((n) ? "possible" : "impossible") << "\n"
#define Possible(n) cout << ((n) ? "Possible" : "Impossible") << "\n"
#define all(v) v.begin(), v.end()
#define NP(v) next_permutation(all(v))
#define dbg(x) cerr << #x << ":" << x << "\n";
struct io_init
{
io_init()
{
cin.tie(0);
ios::sync_with_stdio(false);
cout << setprecision(30) << setiosflags(ios::fixed);
};
} io_init;
template <typename T>
inline bool chmin(T &a, T b)
{
if (a > b)
{
a = b;
return true;
}
return false;
}
template <typename T>
inline bool chmax(T &a, T b)
{
if (a < b)
{
a = b;
return true;
}
return false;
}
inline ll CEIL(ll a, ll b)
{
return (a + b - 1) / b;
}
template <typename A, size_t N, typename T>
inline void Fill(A (&array)[N], const T &val)
{
fill((T *)array, (T *)(array + N), val);
}
template <typename T, typename U>
constexpr istream &operator>>(istream &is, pair<T, U> &p) noexcept
{
is >> p.first >> p.second;
return is;
}
template <typename T, typename U>
constexpr ostream &operator<<(ostream &os, pair<T, U> &p) noexcept
{
os << p.first << " " << p.second;
return os;
}
#pragma endregion
template <typename T>
struct BIT
{
int n;
vector<T> dat;
BIT() {}
BIT(int n_) : n(n_), dat(n_, 0) {}
// 0-indexed
void add(int i, T x)
{
i++;
while (i <= n)
{
dat[i - 1] += x;
i += i & -i;
}
}
// [0, i)
T sum(int i)
{
T res = 0;
while (i > 0)
{
res += dat[i - 1];
i -= i & -i;
}
return res;
}
// 0-indexed
T get(int i) { return sum(i + 1) - sum(i); }
// [l, r)
T query(int l, int r) { return sum(r) - sum(l); }
void display()
{
for (int i = 0; i < n; i++)
cerr << get(i) << " ";
cerr << "\n";
}
};
void solve()
{
int n;
cin >> n;
vector<ll> a(n), b(n);
rep(i, n) cin >> a[i];
rep(i, n) cin >> b[i];
map<ll, int> mp;
rep(i, n) mp[a[i]] = mp[b[i]] = 0;
int z = 0;
for (auto &&[k, v] : mp)
v = z++;
rep(i, n) a[i] = mp[a[i]];
rep(i, n) b[i] = mp[b[i]];
sort(all(a));
BIT<ll> bit(n * 2);
ll cnt = 0;
rep(i, n)
{
bit.add(b[i], 1);
cnt += bit.query(0, a[i]);
}
cout << cnt << "\n";
}
int main()
{
solve();
}
stoq