Submission #975219

#	Time	Username	Problem	Language	Result	Execution time	Memory
975219		LOLOLO	Bubble Sort 2 (JOI18_bubblesort2)	C++14	38 / 100	28 ms	53084 KiB

bubblesort2

#include "bubblesort2.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
 
#define           f     first
#define           s     second
#define           pb    push_back
#define           ep    emplace
#define           eb    emplace_back
#define           lb    lower_bound
#define           ub    upper_bound
#define       all(x)    x.begin(), x.end()
#define      rall(x)    x.rbegin(), x.rend()
#define   uniquev(v)    sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define     mem(f,x)    memset(f , x , sizeof(f))
#define        sz(x)    (int)(x).size()
#define  __lcm(a, b)    (1ll * ((a) / __gcd((a), (b))) * (b))
#define          mxx    *max_element
#define          mnn    *min_element
#define    cntbit(x)    __builtin_popcountll(x)
#define       len(x)    (int)(x.length())
 
const int N = 1e6 + 100;

struct seg{
    vector <int> st, laz;
    void ass(int n) {
        st.assign(n * 4 + 100, 0);
        laz.assign(n * 4 + 100, 0);
    }

    void push(int id) {
        int t = laz[id];
        laz[id * 2] += t;
        laz[id * 2 + 1] += t;
        st[id * 2] += t;
        st[id * 2 + 1] += t;
        laz[id] = 0;
    }

    void upd(int id, int l, int r, int u, int v, int c) {
        if (l > v || r < u || u > v)
            return;

        if (l >= u && r <= v) {
            st[id] += c;
            laz[id] += c;
            return;
        }

        push(id);
        int m = (l + r) / 2;
        upd(id * 2, l, m, u, v, c);
        upd(id * 2 + 1, m + 1, r, u, v, c);
        st[id] = max(st[id * 2], st[id * 2 + 1]);
    }

    int get() {
        return st[1];
    }
};

set <int> pos[N];
int a[N], used[N];

vector <int> countScans(vector <int> A, vector <int> X, vector <int> V) {
    map <int, int> mp;
    for (auto &x : A)
        mp[x];

    for (auto &x : V)
        mp[x];

    int sz = 0;
    for (auto &x : mp) {
        sz++;
        x.s = sz;
    }

    seg st;
    st.ass(sz);

    int n = sz(A);
    for (int i = 0; i < n; i++) {
        A[i] = mp[A[i]];
        a[i + 1] = A[i];
        pos[a[i + 1]].insert(i + 1);
    }

    for (auto &x : V)
        x = mp[x];

    for (int i = n; i >= 1; i--) {
        if (used[a[i]] == 0) {
            used[a[i]] = 1;
            st.upd(1, 1, sz, a[i], a[i], i);       
        }

        st.upd(1, 1, sz, a[i] + 1, sz, -1);
    }

    vector <int> ans;
    int q = sz(X);

    for (int i = 0; i < q; i++) {
        X[i]++;
        int v = a[X[i]], nx = V[i];
        st.upd(1, 1, sz, v + 1, sz, 1);
        st.upd(1, 1, sz, nx + 1, sz, -1);

        if (*(--pos[v].end()) == X[i]) {
            if (sz(pos[v]) == 1) {
                st.upd(1, 1, sz, v, v, -X[i]);
            } else {
                auto it = (--pos[v].end());
                it--;
                st.upd(1, 1, sz, v, v, -(X[i] - (*it)));
            }
        }

        pos[v].erase(X[i]);
        a[X[i]] = nx;

        if (pos[nx].empty() || *(--pos[nx].end()) < X[i]) {
            int add = X[i];
            if (sz(pos[nx])) {
                add -= *(--pos[nx].end());
            }
            st.upd(1, 1, sz, nx, nx, add);
        }

        pos[nx].insert(X[i]);
        ans.pb(st.get() - 1);
    }

    return ans;
}


 

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