結果

問題 No.1270 Range Arrange Query
ユーザー tokusakurai
提出日時 2020-10-24 09:51:04
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 1,457 ms / 7,000 ms
コード長 5,026 bytes
コンパイル時間 1,837 ms
コンパイル使用メモリ 201,520 KB
最終ジャッジ日時 2025-01-15 14:53:05
ジャッジサーバーID
（参考情報） 		judge4 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 15
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 #
プレゼンテーションモードにする

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < n; i++)
#define rep2(i, x, n) for(int i = x; i <= n; i++)
#define rep3(i, x, n) for(int i = x; i >= n; i--)
#define each(e, v) for(auto &e: v)
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)x.size()
using ll = long long;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
const int inf = (1<<30)-1;
const ll INF = (1LL<<60)-1;
const double pi = acos(-1.0);
const double EPS = 1e-10;
template<typename T> bool chmax(T &x, const T &y){
    if(x < y) {x = y; return true;}
    return false;
}
template<typename T> bool chmin(T &x, const T &y){
    if(x > y) {x = y; return true;}
    return false;
}
template<typename T> void in(T &x){
    cin >> x;
}
template<typename T> void out(T x){
    cout << x << '\n';
}
template<typename T> void out2(T x){
    cout << x << ' ';
}
template<typename T, typename U> void in(pair<T, U> &p){
    cin >> p.first >> p.second;
}
template<typename T, typename U> void out(pair<T, U> p){
    cout << p.first << ' ' << p.second << '\n';
}
using vi = vector<int>;
using vll = vector<ll>;
#define vec(type, name, a, x) vector<type> name(a, x)
#define VEC(type, a, x) vector<type>(a, x)
#define vec2(type, name, a, b, x) vector<vector<type>> name(a, VEC(type, b, x))
#define VEC2(type, a, b, x) vector<vector<type>>(a, VEC(type, b, x))
#define vec3(type, name, a, b, c, x) vector<vector<vector<type>>> name(a, VEC2(type, b, c, x))
#define VEC3(type, a, b, c, x) vector<vector<vector<type>>>(a, VEC2(type, b, c, x))
#define vec4(type, name, a, b, c, d, x) vector<vector<vector<vector<type>>>> name(a, VEC3(type, b, c, d, x))
#define VEC4(type, a, b, c, d, x) vector<vector<vector<vector<type>>>>(a, VEC3(type, b, c, d, x))
#define vec5(type, name, a, b, c, d, e, x) vector<vector<vector<vector<vector<type>>>>> name(a, VEC4(type, b, c, d, e, x))
#define VEC5(type, a, b, c, d, e, x) vector<vector<vector<vector<vector<type>>>>>(a, VEC4(type, b, c, d, e, x))
template<typename T> void in(vector<T> &a){
    rep(i, sz(a)) cin >> a[i];
}
template<typename T> void out(const vector<T> &a){
    for(auto &e: a) cout << e << '\n';
}
template<typename T> void out2(const vector<T> &a){
    for(auto &e: a) cout << e << ' '; cout << '\n';
}
template<typename T> void unique(vector<T> &a){
    sort(all(a)), a.erase(unique(all(a)), a.end());
}
vector<int> iota(int n){
    vector<int> ret(n);
    iota(all(ret), 0);
    return ret;
}
template<typename T> vector<int> iota(const vector<T> &a, bool greater = false){
    vector<int> ret = iota(sz(a));
    sort(all(ret), [&](int i, int j){
        return (a[i] < a[j])^greater;
    });
    return ret;
}
struct io_setup{
    io_setup(){
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        cout << fixed << setprecision(15);
    }
} io_setup;
const int MOD = 1000000007;
//const int MOD = 998244353;
template<typename T>
struct Binary_Indexed_Tree{
    vector<T> bit;
    const int n;
    
    Binary_Indexed_Tree(const vector<T> &v) : n(sz(v)){
        bit.resize(n+1);
        copy(all(v), bit.begin()+1);
        for(int a = 2; a <= n; a <<= 1){
            for(int b = a; b <= n; b += a){
                bit[b] += bit[b-a/2];
            }
        }
    }
    
    void add(int i, const T &x){
        for(i++; i <= n; i += (i & -i)) bit[i] += x;
    }
    void change(int i, const T&x){
        add(i, x-query(i, i+1));
    }
    
    T sum(int i) const{
        T ret = 0;
        for(; i > 0; i -= (i & -i)) ret += bit[i];
        return ret;
    }
    
    T query(int l, int r) const{
        return sum(r) - sum(l);
    }
    int lower_bound(T x) const{
        int ret = 0;
        for(int k = 31-__builtin_clz(n); k >= 0; k--){
            if(ret+(1<<k) <= n && bit[ret+(1<<k)] < x) x -= bit[ret += (1<<k)]; 
        }
        return ret;
    }
    int upper_bound(T x) const {return lower_bound(x+1);}
};
int main(){
    int N, Q;
    cin >> N >> Q;
    vi a(N);
    in(a);
    rep(i, N) a[i]--;
    ll ans = 0;
    Binary_Indexed_Tree<int> bit1(vector<int>(N, 0)), bit2(vector<int>(N, 0));
    vll invl(N+1, 0), invr(N+1, 0);
    rep(i, N){
        bit1.add(a[i], 1);
        invl[i+1] = invl[i]+bit1.query(a[i]+1, N);
    }
    rep3(i, N-1, 0){
        bit2.add(a[i], 1);
        invr[i] = invr[i+1]+bit2.query(0, a[i]);
    }
    vll cntl(N, 0), cntr(N, 0), suml(N+1, 0), sumr(N+1, 0);
    while(Q--){
        int l, r; cin >> l >> r; l--;
        ll ans = invl[l]+invr[r];
        rep(i, l) cntl[a[i]]++;
        rep2(i, r, N-1) cntr[a[i]]++;
        rep3(i, N-1, 0) suml[i] = suml[i+1]+cntl[i];
        rep(i, N) sumr[i+1] = sumr[i]+cntr[i];
        rep(i, l) ans += sumr[a[i]];
        ll tmp = INF;
        rep(i, N) chmin(tmp, suml[i+1]+sumr[i]);
        ans += tmp*(r-l);
        out(ans);
        fill(all(cntl), 0), fill(all(cntr), 0), fill(all(suml), 0), fill(all(sumr), 0);
    }
}
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