結果

問題 No.1282 Display Elements
ユーザー heno239heno239
提出日時 2020-11-17 15:51:31
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 86 ms / 2,000 ms
コード長 3,990 bytes
コンパイル時間 2,188 ms
コンパイル使用メモリ 133,288 KB
実行使用メモリ 10,612 KB
最終ジャッジ日時 2024-07-23 08:20:25
合計ジャッジ時間 4,891 ms
ジャッジサーバーID
(参考情報)
judge5 / judge4
このコードへのチャレンジ
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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
7,492 KB
testcase_01 AC 4 ms
7,624 KB
testcase_02 AC 4 ms
7,620 KB
testcase_03 AC 4 ms
7,620 KB
testcase_04 AC 4 ms
7,488 KB
testcase_05 AC 4 ms
7,492 KB
testcase_06 AC 4 ms
7,616 KB
testcase_07 AC 4 ms
7,620 KB
testcase_08 AC 4 ms
7,616 KB
testcase_09 AC 4 ms
7,496 KB
testcase_10 AC 4 ms
7,620 KB
testcase_11 AC 5 ms
7,620 KB
testcase_12 AC 4 ms
7,616 KB
testcase_13 AC 5 ms
7,492 KB
testcase_14 AC 5 ms
7,620 KB
testcase_15 AC 78 ms
10,292 KB
testcase_16 AC 32 ms
8,584 KB
testcase_17 AC 66 ms
9,788 KB
testcase_18 AC 41 ms
8,924 KB
testcase_19 AC 37 ms
9,332 KB
testcase_20 AC 36 ms
9,208 KB
testcase_21 AC 86 ms
10,612 KB
testcase_22 AC 53 ms
9,336 KB
testcase_23 AC 86 ms
10,488 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#pragma GCC optimize("Ofast")
#pragma GCC target ("sse4")

#include<iostream>
#include<string>
#include<cstdio>
#include<vector>
#include<cmath>
#include<algorithm>
#include<functional>
#include<iomanip>
#include<queue>
#include<ciso646>
#include<random>
#include<map>
#include<set>
#include<bitset>
#include<stack>
#include<unordered_map>
#include<unordered_set>
#include<utility>
#include<cassert>
#include<complex>
#include<numeric>
#include<array>
using namespace std;

//#define int long long
typedef long long ll;

typedef unsigned long long ul;
typedef unsigned int ui;
constexpr ll mod = 1000000007;
const ll INF = mod * mod;
typedef pair<int, int>P;
#define stop char nyaa;cin>>nyaa;
#define rep(i,n) for(int i=0;i<n;i++)
#define per(i,n) for(int i=n-1;i>=0;i--)
#define Rep(i,sta,n) for(int i=sta;i<n;i++)
#define rep1(i,n) for(int i=1;i<=n;i++)
#define per1(i,n) for(int i=n;i>=1;i--)
#define Rep1(i,sta,n) for(int i=sta;i<=n;i++)
#define all(v) (v).begin(),(v).end()
typedef pair<ll, ll> LP;
typedef double ld;
typedef pair<ld, ld> LDP;
const ld eps = 1e-12;
const ld pi = acosl(-1.0);

ll mod_pow(ll x, ll n, ll m = mod) {
    ll res = 1;
    while (n) {
        if (n & 1)res = res * x % m;
        x = x * x % m; n >>= 1;
    }
    return res;
}
struct modint {
    ll n;
    modint() :n(0) { ; }
    modint(ll m) :n(m) {
        if (n >= mod)n %= mod;
        else if (n < 0)n = (n % mod + mod) % mod;
    }
    operator int() { return n; }
};
bool operator==(modint a, modint b) { return a.n == b.n; }
modint operator+=(modint& a, modint b) { a.n += b.n; if (a.n >= mod)a.n -= mod; return a; }
modint operator-=(modint& a, modint b) { a.n -= b.n; if (a.n < 0)a.n += mod; return a; }
modint operator*=(modint& a, modint b) { a.n = ((ll)a.n * b.n) % mod; return a; }
modint operator+(modint a, modint b) { return a += b; }
modint operator-(modint a, modint b) { return a -= b; }
modint operator*(modint a, modint b) { return a *= b; }
modint operator^(modint a, ll n) {
    if (n == 0)return modint(1);
    modint res = (a * a) ^ (n / 2);
    if (n % 2)res = res * a;
    return res;
}

ll inv(ll a, ll p) {
    return (a == 1 ? 1 : (1 - p * inv(p % a, a)) / a + p);
}
modint operator/(modint a, modint b) { return a * modint(inv(b, mod)); }

const int max_n = 1 << 18;
modint fact[max_n], factinv[max_n];
void init_f() {
    fact[0] = modint(1);
    for (int i = 0; i < max_n - 1; i++) {
        fact[i + 1] = fact[i] * modint(i + 1);
    }
    factinv[max_n - 1] = modint(1) / fact[max_n - 1];
    for (int i = max_n - 2; i >= 0; i--) {
        factinv[i] = factinv[i + 1] * modint(i + 1);
    }
}
modint comb(int a, int b) {
    if (a < 0 || b < 0 || a < b)return 0;
    return fact[a] * factinv[b] * factinv[a - b];
}

struct BIT {
private:
    vector<ll> node; int n;
public:
    BIT(int n_) {
        n = n_; node.resize(n, 0);
    }
    //0-indexed
    void add(int a, ll w) {
        for (int i = a; i < n; i |= i + 1)node[i] += w;
    }
    //[0,a)
    ll sum(int a) {
        ll ret = 0;
        for (int i = a - 1; i >= 0; i = (i & (i + 1)) - 1)ret += node[i];
        return ret;
    }
    //[a,b)
    ll sum(int a, int b) {
        return sum(b) - sum(a);
    }
};

void solve() {
    int n; cin >> n;
    vector<int> a(n); rep(i, n)cin >> a[i];
    vector<int> b(n); rep(i, n)cin >> b[i];
    vector<int> vx;
    rep(i, n) {
        vx.push_back(a[i]);
        vx.push_back(b[i]);
    }
    sort(all(vx));
    vx.erase(unique(all(vx)), vx.end());
    BIT bt(vx.size());
    rep(i, n) {
        a[i] = lower_bound(all(vx), a[i]) - vx.begin();
        b[i] = lower_bound(all(vx), b[i]) - vx.begin();
    }
    sort(all(a));
    ll ans = 0;
    rep(i, n) {
        bt.add(b[i], 1);
        ans += bt.sum(0, a[i]);
    }
    cout << ans << "\n";
}

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    // cout << fixed << setprecision(15);
     //init_f();
     //init();
     //expr();
     //int t; cin >> t; rep(i, t)
    solve();
    return 0;
}
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