Submission #210798

#	Time	Username	Problem	Language	Result	Execution time	Memory
210798		2qbingxuan	Bubble Sort 2 (JOI18_bubblesort2)	C++14	60 / 100	847 ms	50048 KiB

bubblesort2

#include <bits/stdc++.h>
#define pb emplace_back
#define get_pos(u,x) (lower_bound(begin(u),end(u),x) - begin(u))
using namespace std;
typedef long long ll;
const ll N = 500025, INF = 1e18;

struct Segtree {
    ll mx[N<<1],lz[N];
    void upd(int p, ll d) {
        mx[p] += d;
        if(p < N) lz[p] += d;
    }
    void pull(int p) {
        for(; p>1; p>>=1) mx[p>>1] = max(mx[p],mx[p^1]) + lz[p>>1];
    }
    void push(int p) {
        for(int h = __lg(N); h >= 0; h--) {
            int i = p>>h;
            if(!lz[i>>1]) continue;
            upd(i,lz[i>>1]);
            upd(i^1,lz[i>>1]);
            lz[i>>1] = 0;
        }
    }
    void add(int l, int r, ll d) {
        int L = l, R = r;
        for(l+=N,r+=N; l<r; l>>=1,r>>=1) {
            if(l&1) upd(l++, d);
            if(r&1) upd(--r, d);
        }
        pull(L+N), pull(R-1+N);
    }
    ll query(int l, int r) {
        ll res = -INF;
        push(l+N), push(r-1+N);
        for(l+=N,r+=N; l<r; l>>=1,r>>=1) {
            if(l&1) res = max(res, mx[l++]);
            if(r&1) res = max(res, mx[--r]);
        }
        return res;
    }
    void dbg() {
        cout << "-------\n";
        for(int i = 0; i < 10; i++) {
            push(i+N);
            cout << mx[i+N] << ' ';
        }
        cout << '\n';
    }
} sgt;

vector<int> countScans(vector<int> A, vector<int> X, vector<int> V) {
    int n = A.size(), q = X.size();
    vector<ll> a(n), v(q);
    {
        for(int i = 0; i < n; i++) a[i] = A[i] * N + i;
        for(int i = 0; i < q; i++) v[i] = V[i] * N + X[i];
    }
    {
        vector<ll> u;
        for(int i = 0; i < n; i++) u.pb(a[i]);
        for(int i = 0; i < q; i++) u.pb(v[i]);
        sort(u.begin(), u.end());
        u.erase(unique(u.begin(), u.end()), u.end());
        for(int i = 0; i < n; i++) a[i] = get_pos(u, a[i]) + 1;
        for(int i = 0; i < q; i++) v[i] = get_pos(u, v[i]) + 1;
    }
    vector<int> Q;
    //sgt.init();
    for(int i = 0; i < n; i++) {
        sgt.add(a[i], a[i]+1, i);
        sgt.add(a[i]+1, N, -1);
    }
    for(int i = 0; i < q; i++) {
        int x = X[i], val = v[i];
        sgt.add(a[x],a[x]+1, -x);
        sgt.add(a[x]+1, N, 1);
        a[x] = val;
        sgt.add(a[x],a[x]+1, x);
        sgt.add(a[x]+1, N, -1);
        //sgt.dbg();
        Q.pb(sgt.query(0,N));
    }
    return Q;
}

• Subtask 1: 17 / 17
• Subtask 2: 21 / 21
• Subtask 3: 22 / 22
• Subtask 4: 0 / 40