結果
問題 | No.1115 二つの数列 / Two Sequences |
ユーザー | bond_cmprog |
提出日時 | 2020-07-17 21:54:53 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 24 ms / 2,000 ms |
コード長 | 5,160 bytes |
コンパイル時間 | 2,423 ms |
コンパイル使用メモリ | 204,412 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-05-07 08:18:41 |
合計ジャッジ時間 | 3,600 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 3 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 20 ms
5,376 KB |
testcase_04 | AC | 22 ms
5,376 KB |
testcase_05 | AC | 20 ms
5,376 KB |
testcase_06 | AC | 18 ms
5,376 KB |
testcase_07 | AC | 23 ms
5,376 KB |
testcase_08 | AC | 3 ms
5,376 KB |
testcase_09 | AC | 13 ms
5,376 KB |
testcase_10 | AC | 20 ms
5,376 KB |
testcase_11 | AC | 1 ms
5,376 KB |
testcase_12 | AC | 24 ms
5,376 KB |
testcase_13 | AC | 22 ms
5,376 KB |
testcase_14 | AC | 23 ms
5,376 KB |
testcase_15 | AC | 2 ms
5,376 KB |
testcase_16 | AC | 1 ms
5,376 KB |
testcase_17 | AC | 1 ms
5,376 KB |
testcase_18 | AC | 1 ms
5,376 KB |
testcase_19 | AC | 1 ms
5,376 KB |
testcase_20 | AC | 2 ms
5,376 KB |
testcase_21 | AC | 1 ms
5,376 KB |
testcase_22 | AC | 2 ms
5,376 KB |
testcase_23 | AC | 3 ms
5,376 KB |
testcase_24 | AC | 9 ms
5,376 KB |
testcase_25 | AC | 18 ms
5,376 KB |
testcase_26 | AC | 6 ms
5,376 KB |
testcase_27 | AC | 11 ms
5,376 KB |
testcase_28 | AC | 14 ms
5,376 KB |
testcase_29 | AC | 18 ms
5,376 KB |
testcase_30 | AC | 24 ms
5,376 KB |
testcase_31 | AC | 7 ms
5,376 KB |
testcase_32 | AC | 5 ms
5,376 KB |
testcase_33 | AC | 20 ms
5,376 KB |
testcase_34 | AC | 2 ms
5,376 KB |
testcase_35 | AC | 1 ms
5,376 KB |
testcase_36 | AC | 1 ms
5,376 KB |
testcase_37 | AC | 2 ms
5,376 KB |
testcase_38 | AC | 2 ms
5,376 KB |
testcase_39 | AC | 2 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> #define REP(i, n) for(int i = 0;i < n;i++) #define ll long long using namespace std; typedef pair<int, int> P; typedef pair<ll,ll> LP; const int dx[8] = {1, 0, -1, 0, 1, -1, -1, 1}; const int dy[8] = {0, 1, 0, -1, 1, 1, -1, -1}; const int INF = 1000000000; const ll LINF = 1000000000000000000;//1e18 const ll MOD = 1000000007; const ll MOD2 = 998244353; const double PI = acos(-1.0); const double EPS = 1e-10; template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; } template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; } //template<class T> inline void add(T &a, T b){a = ((a+b) % MOD + MOD) % MOD;}; template<int MOD> struct Fp { long long val; constexpr Fp(long long v = 0) noexcept : val(v % MOD) { if (val < 0) val += MOD; } constexpr int getmod() { return MOD; } constexpr Fp operator - () const noexcept { return val ? MOD - val : 0; } constexpr Fp operator + (const Fp& r) const noexcept { return Fp(*this) += r; } constexpr Fp operator - (const Fp& r) const noexcept { return Fp(*this) -= r; } constexpr Fp operator * (const Fp& r) const noexcept { return Fp(*this) *= r; } constexpr Fp operator / (const Fp& r) const noexcept { return Fp(*this) /= r; } constexpr Fp& operator += (const Fp& r) noexcept { val += r.val; if (val >= MOD) val -= MOD; return *this; } constexpr Fp& operator -= (const Fp& r) noexcept { val -= r.val; if (val < 0) val += MOD; return *this; } constexpr Fp& operator *= (const Fp& r) noexcept { val = val * r.val % MOD; return *this; } constexpr Fp& operator /= (const Fp& r) noexcept { long long a = r.val, b = MOD, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b; swap(a, b); u -= t * v; swap(u, v); } val = val * u % MOD; if (val < 0) val += MOD; return *this; } constexpr bool operator == (const Fp& r) const noexcept { return this->val == r.val; } constexpr bool operator != (const Fp& r) const noexcept { return this->val != r.val; } friend constexpr ostream& operator << (ostream &os, const Fp<MOD>& x) noexcept { return os << x.val; } friend constexpr Fp<MOD> modpow(const Fp<MOD> &a, long long n) noexcept { if (n == 0) return 1; auto t = modpow(a, n / 2); t = t * t; if (n & 1) t = t * a; return t; } }; template<class T> struct BiCoef { vector<T> fact_, inv_, finv_; constexpr BiCoef() {} constexpr BiCoef(int n) noexcept : fact_(n, 1), inv_(n, 1), finv_(n, 1) { init(n); } constexpr void init(int n) noexcept { fact_.assign(n, 1), inv_.assign(n, 1), finv_.assign(n, 1); int MOD = fact_[0].getmod(); for(int i = 2; i < n; i++){ fact_[i] = fact_[i-1] * i; inv_[i] = -inv_[MOD%i] * (MOD/i); finv_[i] = finv_[i-1] * inv_[i]; } } constexpr T com(int n, int k) const noexcept { if (n < k || n < 0 || k < 0) return 0; return fact_[n] * finv_[k] * finv_[n-k]; } constexpr T fact(int n) const noexcept { if (n < 0) return 0; return fact_[n]; } constexpr T inv(int n) const noexcept { if (n < 0) return 0; return inv_[n]; } constexpr T finv(int n) const noexcept { if (n < 0) return 0; return finv_[n]; } constexpr T perm(int n, int k) const noexcept { if (n < k || n < 0 || k < 0) return 0; return fact_[n] * finv_[n-k]; } }; using mint = Fp<MOD>; BiCoef<mint> bc; // using vec = vector<mint>; // using mat = vector<vec>; template <class Abel> struct BIT { const Abel UNITY_SUM = 0; // to be set vector<Abel> dat; /* [1, n] */ BIT(int n) : dat(n + 1, UNITY_SUM) { } void init(int n) { dat.assign(n + 1, UNITY_SUM); } /* a is 1-indexed */ inline void add(int a, Abel x) { for (int i = a; i < (int)dat.size(); i += i & -i) dat[i] = dat[i] + x; } /* [1, a], a is 1-indexed */ inline Abel sum(int a) { Abel res = UNITY_SUM; for (int i = a; i > 0; i -= i & -i) res = res + dat[i]; return res; } /* [a, b), a and b are 1-indexed */ inline Abel sum(int a, int b) { return sum(b - 1) - sum(a - 1); } /* debug */ void print() { for (int i = 1; i < (int)dat.size(); ++i) cout << sum(i, i + 1) << ","; cout << endl; } }; void solve(){ int n; cin >> n; vector<int> a(n), b(n); vector<int> idx(n+1); REP(i,n) cin >> a[i]; REP(i,n){ cin >> b[i]; idx[b[i]] = i; } BIT<int> bit(n); ll ans = 0; REP(i,n){ ans += i - bit.sum(idx[a[i]]); bit.add(idx[a[i]]+1, 1); } cout << ans << endl; } int main(){ cin.tie(0); ios::sync_with_stdio(false); solve(); // int T; cin >> T; REP(t,T) solve(); }