結果
問題 | No.1115 二つの数列 / Two Sequences |
ユーザー |
|
提出日時 | 2020-07-17 21:35:20 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 77 ms / 2,000 ms |
コード長 | 6,368 bytes |
コンパイル時間 | 1,896 ms |
コンパイル使用メモリ | 173,996 KB |
実行使用メモリ | 7,936 KB |
最終ジャッジ日時 | 2024-11-29 22:09:45 |
合計ジャッジ時間 | 4,178 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 5 |
other | AC * 35 |
ソースコード
#include <bits/stdc++.h>using namespace std;// Defineusing ll = long long;using ull = unsigned long long;using ld = long double;template <class T> using pvector = vector<pair<T, T>>;template <class T>using rpriority_queue = priority_queue<T, vector<T>, greater<T>>;constexpr const ll dx[4] = {1, 0, -1, 0};constexpr const ll dy[4] = {0, 1, 0, -1};constexpr const ll MOD = 1e9 + 7;constexpr const ll mod = 998244353;constexpr const ll INF = 1LL << 60;constexpr const ll inf = 1 << 30;constexpr const char rt = '\n';constexpr const char sp = ' ';#define rt(i, n) (i == (ll)(n) -1 ? rt : sp)#define len(x) ((ll)(x).size())#define all(x) (x).begin(), (x).end()#define rall(x) (x).rbegin(), (x).rend()#define mp make_pair#define mt make_tuple#define pb push_back#define eb emplace_back#define ifn(x) if (not(x))#define elif else if#define elifn else ifn#define fi first#define se secondtemplate <class T> bool chmax(T &a, const T &b) {if (a < b) {a = b;return 1;}return 0;}template <class T> bool chmin(T &a, const T &b) {if (a > b) {a = b;return 1;}return 0;}// Debug#define debug(...) \{ \cerr << __LINE__ << ": " << #__VA_ARGS__ << " = "; \for (auto &&X : {__VA_ARGS__}) cerr << "[" << X << "] "; \cerr << rt; \}#define dump(a, h, w) \{ \cerr << __LINE__ << ": " << #a << " = [" << rt; \rep(_i, h) { \rep(_j, w) { \if (abs(a[_i][_j]) >= INF / 2 and a[_i][_j] <= -INF / 2) \cerr << '-'; \if (abs(a[_i][_j]) >= INF / 2) \cerr << "∞" << sp; \else \cerr << a[_i][_j] << sp; \} \cerr << rt; \} \cerr << "]" << rt; \}#define vdump(a, n) \{ \cerr << __LINE__ << ": " << #a << " = ["; \rep(_i, n) { \if (_i) cerr << sp; \if (abs(a[_i]) >= INF / 2 and a[_i] <= -INF / 2) cerr << '-'; \if (abs(a[_i]) >= INF / 2) \cerr << "∞" << sp; \else \cerr << a[_i]; \} \cerr << "]" << rt; \}// Loop#define inc(i, a, n) for (ll i = (a), _##i = (n); i <= _##i; ++i)#define dec(i, a, n) for (ll i = (a), _##i = (n); i >= _##i; --i)#define rep(i, n) for (ll i = 0, _##i = (n); i < _##i; ++i)#define each(i, a) for (auto &&i : a)// Stream#define fout(n) cout << fixed << setprecision(n)struct io {io() { cin.tie(nullptr), ios::sync_with_stdio(false); }} io;// Speed#pragma GCC optimize("Ofast,unroll-loops")#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")// Mathinline constexpr ll gcd(const ll a, const ll b) {return b ? gcd(b, a % b) : a;}inline constexpr ll lcm(const ll a, const ll b) { return a / gcd(a, b) * b; }inline constexpr ll modulo(const ll n, const ll m = MOD) {ll k = n % m;return k + m * (k < 0);}inline constexpr ll chmod(ll &n, const ll m = MOD) {n %= m;return n += m * (n < 0);}inline constexpr ll mpow(ll a, ll n, const ll m = MOD) {ll r = 1;rep(i, 64) {if (n & (1LL << i)) r *= a;chmod(r, m);a *= a;chmod(a, m);}return r;}inline ll inv(const ll n, const ll m = MOD) {ll a = n, b = m, x = 1, y = 0;while (b) {ll t = a / b;a -= t * b;swap(a, b);x -= t * y;swap(x, y);}return modulo(x, m);}vector<ll> rev(vector<ll> a) {vector<ll> b(len(a));rep(i, len(a)) b[a[i]] = i;return b;}vector<ll> mul(vector<ll> a, vector<ll> b) {vector<ll> c(len(a));rep(i, len(a)) c[i] = b[a[i]];return c;}ll res = 0;void merge(vector<ll>::iterator left, vector<ll>::iterator mid,vector<ll>::iterator right) {vector<ll>::iterator iter = left, i1 = left, i2 = mid;vector<ll> v;while (i1 != mid && i2 != right) {if (*i1 < *i2) {v.push_back(*i1), i1++;} else {v.push_back(*i2), i2++;res += mid - i1;}}while (i1 != mid) v.push_back(*i1), i1++;while (i2 != right) v.push_back(*i2), i2++;while (iter != right) {*iter = v[iter - left];iter++;}}void mergesort(vector<ll>::iterator left, vector<ll>::iterator right) {if (right - left <= 1) return;vector<ll>::iterator mid = left + (right - left) / 2;mergesort(left, mid);mergesort(mid, right);merge(left, mid, right);}signed main() {ll N;cin >> N;vector<ll> A(N), B(N);rep(i, N) cin >> A[i], A[i]--;rep(i, N) cin >> B[i], B[i]--;auto v = mul(B, rev(A));mergesort(all(v));cout << res << rt;}