#512983 (C++17) No.1115 二つの数列 / Two Sequences

提出ソース

結果

問題	No.1115 二つの数列 / Two Sequences
ユーザー	haruki_K
提出日時	2020-07-17 21:44:06
言語	C++17 (gcc 13.2.0 + boost 1.83.0)
結果	AC
実行時間	25 ms / 2,000 ms
コード長	5,857 bytes
コンパイル時間	2,584 ms
コンパイル使用メモリ	201,444 KB
実行使用メモリ	6,248 KB
最終ジャッジ日時	2023-08-20 00:22:18
合計ジャッジ時間	4,128 ms
ジャッジサーバーID （参考情報）	judge15 / judge13

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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	4 ms 4,380 KB
testcase_01	AC	2 ms 4,380 KB
testcase_02	AC	2 ms 4,380 KB
testcase_03	AC	21 ms 5,728 KB
testcase_04	AC	25 ms 6,116 KB
testcase_05	AC	22 ms 5,584 KB
testcase_06	AC	20 ms 5,312 KB
testcase_07	AC	25 ms 6,112 KB
testcase_08	AC	2 ms 4,380 KB
testcase_09	AC	13 ms 4,852 KB
testcase_10	AC	23 ms 6,248 KB
testcase_11	AC	2 ms 4,376 KB
testcase_12	AC	25 ms 6,224 KB
testcase_13	AC	25 ms 6,228 KB
testcase_14	AC	25 ms 6,224 KB
testcase_15	AC	1 ms 4,376 KB
testcase_16	AC	1 ms 4,380 KB
testcase_17	AC	2 ms 4,376 KB
testcase_18	AC	2 ms 4,376 KB
testcase_19	AC	1 ms 4,380 KB
testcase_20	AC	1 ms 4,376 KB
testcase_21	AC	2 ms 4,380 KB
testcase_22	AC	1 ms 4,380 KB
testcase_23	AC	3 ms 4,380 KB
testcase_24	AC	10 ms 4,376 KB
testcase_25	AC	19 ms 5,324 KB
testcase_26	AC	6 ms 4,376 KB
testcase_27	AC	11 ms 4,376 KB
testcase_28	AC	15 ms 4,804 KB
testcase_29	AC	20 ms 5,316 KB
testcase_30	AC	24 ms 5,988 KB
testcase_31	AC	7 ms 4,376 KB
testcase_32	AC	5 ms 4,380 KB
testcase_33	AC	20 ms 5,672 KB
testcase_34	AC	2 ms 4,380 KB
testcase_35	AC	1 ms 4,504 KB
testcase_36	AC	1 ms 4,376 KB
testcase_37	AC	1 ms 4,376 KB
testcase_38	AC	1 ms 4,380 KB
testcase_39	AC	1 ms 4,376 KB

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ソースコード

raw source code

// >>> TEMPLATES
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
using i32 = int32_t;
using i64 = int64_t;
using u32 = uint32_t;
using u64 = uint64_t;
#define int ll
#define double ld
#define rep(i,n) for (int i = 0; i < (int)(n); i++)
#define rep1(i,n) for (int i = 1; i <= (int)(n); i++)
#define repR(i,n) for (int i = (int)(n)-1; i >= 0; i--)
#define rep1R(i,n) for (int i = (int)(n); i >= 1; i--)
#define loop(i,a,B) for (int i = a; i B; i++)
#define loopR(i,a,B) for (int i = a; i B; i--)
#define all(x) (x).begin(), (x).end()
#define allR(x) (x).rbegin(), (x).rend()
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fst first
#define snd second
template <class Int> auto constexpr inf = numeric_limits<Int>::max()/2-1;
auto constexpr INF32 = inf<int32_t>;
auto constexpr INF64 = inf<int64_t>;
auto constexpr INF   = inf<int>;
#ifdef LOCAL
#include "debug.hpp"
#else
#define dump(...) (void)(0)
#define say(x) (void)(0)
#define debug if (0)
#endif
template <class T> using pque_max = priority_queue<T>;
template <class T> using pque_min = priority_queue<T, vector<T>, greater<T> >;
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
ostream& operator<<(ostream& os, T const& v) { bool f = true; for (auto const& x : v) os << (f ? "" : " ") << x, f = false; return os; }
template <class T, class = typename T::iterator, class = typename enable_if<!is_same<T, string>::value>::type>
istream& operator>>(istream& is, T &v) { for (auto& x : v) is >> x; return is; }
template <class T, class S> ostream& operator<<(ostream& os, pair<T,S> const& p) { return os << "(" << p.first << ", " << p.second << ")"; }
template <class T, class S> istream& operator>>(istream& is, pair<T,S>& p) { return is >> p.first >> p.second; }
struct IOSetup { IOSetup() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } iosetup;
template <class F> struct FixPoint : private F {
    constexpr FixPoint(F&& f) : F(forward<F>(f)) {}
    template <class... T> constexpr auto operator()(T&&... x) const { return F::operator()(*this, forward<T>(x)...); }
};
struct MakeFixPoint {
    template <class F> constexpr auto operator|(F&& f) const { return FixPoint<F>(forward<F>(f)); }
};
#define MFP MakeFixPoint()|
#define def(name, ...) auto name = MFP [&](auto &&name, __VA_ARGS__)
template <class T, size_t d> struct vec_impl {
    using type = vector<typename vec_impl<T,d-1>::type>;
    template <class... U> static type make_v(size_t n, U&&... x) { return type(n, vec_impl<T,d-1>::make_v(forward<U>(x)...)); }
};
template <class T> struct vec_impl<T,0> { using type = T; static type make_v(T const& x = {}) { return x; } };
template <class T, size_t d = 1> using vec = typename vec_impl<T,d>::type;
template <class T, size_t d = 1, class... Args> auto make_v(Args&&... args) { return vec_impl<T,d>::make_v(forward<Args>(args)...); }
template <class T> void quit(T const& x) { cout << x << endl; exit(0); }
template <class T, class U> constexpr bool chmin(T& x, U const& y) { if (x > y) { x = y; return true; } return false; }
template <class T, class U> constexpr bool chmax(T& x, U const& y) { if (x < y) { x = y; return true; } return false; }
template <class It> constexpr auto sumof(It b, It e) { return accumulate(b,e,typename iterator_traits<It>::value_type{}); }
template <class T> int sz(T const& x) { return x.size(); }
template <class C, class T> int lbd(C const& v, T const& x) {
    return lower_bound(v.begin(), v.end(), x)-v.begin();
}
template <class C, class T> int ubd(C const& v, T const& x) {
    return upper_bound(v.begin(), v.end(), x)-v.begin();
}
const int dx[] = { 1,0,-1,0 };
const int dy[] = { 0,1,0,-1 };
constexpr int popcnt(ll x) { return __builtin_popcountll(x); }
template <class Int> struct Random {
    mt19937_64 mt{random_device{}()};
    //mt19937_64 mt{(unsigned)time(0)};
    Int a,b; // [a,b]
    Random(Int a, Int b) : a(a), b(b) {}
    Int operator()() { return uniform_int_distribution<Int>(a,b)(mt); }
};
template <class Int> Int rand(Int a, Int b) { // [a,b]
    static mt19937_64 mt{random_device{}()};
    return uniform_int_distribution<Int>(a,b)(mt);
}
// <<<
// >>> BIT

struct BIT {
    int n;
    vector<int> v; // use v[1..n]
    BIT(int n = 0) : n(n), v(n+1) {}
    int size() const { return n; }
    int get(int i) const { return sum(i+1)-sum(i); }
    void set(int i, int x) { add(i,x-get(i)); }
    void add(int i, int x) {
        assert(0 <= i); assert(i < n);
        for (i++; i <= n; i += i&(-i)) v[i] += x;
    }
    int sum(int r) const { // [0,r)
        assert(0 <= r); assert(r <= n);
        int s = 0;
        for (int i = r; i > 0; i -= i&(-i)) s += v[i];
        return s;
    }
    int sum(int l, int r) const { // [l,r)
        return sum(r)-sum(l);
    }
    // lower_bound({sum(0),sum(1),...,sum(n)}, x)
    int lower_bound(int x) const {
        if (x <= 0) return 0;
        int s = 0, i = 0, w = 1;
        while (2*w <= n) w *= 2;
        for ( ; w; w >>= 1) {
            if (i+w <= n && s+v[i+w] < x) {
                s += v[i+w];
                i += w;
            }
        }
        return i+1;
    }
    int upper_bound(int x) const {
        int s = 0, i = 0, w = 1;
        while (2*w <= n) w *= 2;
        for ( ; w; w >>= 1) {
            if (i+w <= n && s+v[i+w] <= x) {
                s += v[i+w];
                i += w;
            }
        }
        return i+1;
    }
};

// <<<

int32_t main() {
    int n; cin >> n;
    vector<int> a(n),b(n); cin >> a >> b;
    rep (i,n) --a[i],--b[i];

    vector<int> pos(n);
    rep (i,n) pos[b[i]] = i;
    rep (i,n) a[i] = pos[a[i]];

    BIT bit(n);
    int ans = 0;
    rep (i,n) {
        ans += bit.sum(a[i]+1,n);
        bit.add(a[i],+1);
    }
    cout << ans << endl;
}

yukicoder

結果

テストケース

ソースコード