Submission #1013712

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013712		vjudge1	Bubble Sort 2 (JOI18_bubblesort2)	C++17	0 / 100	5317 ms	64092 KiB

bubblesort2

#include "bubblesort2.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll = vector <ll>;
using vi = vector <int>;
// using ii = pair <ll, ll>;
// using vii = vector <ii>;

const ll MAXN = 5E5+16, INF = ll(1E18)+16;
priority_queue <ll> pq[2*MAXN];

struct SegTree {
    function <ll(ll, ll)> op;
    ll idem;
    vll tree;
    ll n;

    SegTree (ll n, function <ll(ll, ll)> op, ll idem): op(op), idem(idem), tree(2*n, idem), n(n) {}

    void update (ll id, ll val) {
        tree[id] = val;
    }

    void update (ll ql, ll qr, ll val) {
        for (ll i = ql; i <= qr; i++) tree[i] = op(tree[i], val);
    }

    ll query (ll ql, ll qr) {
        ll ans = idem;
        for (ll i = ql; i <= qr; i++) ans = op(ans, tree[i]);
        return ans;
    }
};

vi countScans (vi a, vi wh, vi val) {
    vll ve(a.begin(), a.end());
    ll n = a.size();
    ll Q = wh.size();
    {vll th = ve;
    for (int i : val) th.push_back(i);
    sort(th.begin(), th.end());
    th.resize(unique(th.begin(), th.end()) - th.begin());
    for (ll &i : ve) i = lower_bound(th.begin(), th.end(), i) - th.begin() ;
    for (int &i : val) i = lower_bound(th.begin(), th.end(), i) - th.begin() ;}
    SegTree stFreq(1E6+16, [&](ll a, ll b){return a+b;}, 0);
    SegTree stAns(1E6+16, [&](ll a, ll b){return max(a,b);}, -INF);
    vi ans;
    for (ll i = 0; i < n; i++) {
        pq[ve[i]].push(i);
        stFreq.update(ve[i], 1);
    }
    auto redo = [&](ll i) {
        while (pq[i].size() && ve[pq[i].top()] != i) pq[i].pop();
        stAns.update(i, -INF);
        if (!pq[i].size()) return;
        stAns.update(i, pq[i].top()+1 - stFreq.query(0, i));
    };
    for (ll i = 0; i < n+wh.size(); i++) redo(i);
    for (ll q = 0; q < Q; q++) {
        ll val1 = ve[wh[q]], val2 = val[q];
        stFreq.update(ve[wh[q]], ve[wh[q]], -1);
        ve[wh[q]] = val[q];
        stFreq.update(ve[wh[q]], ve[wh[q]], +1);
        pq[val[q]].push(wh[q]);
        stAns.update(0, val1, -1);
        stAns.update(0, val2, +1);
        redo(val1);
        redo(val2);
        ans.push_back(stAns.query(0, 1E6+4));
    }
    return ans;
}

Compilation message (stderr)

bubblesort2.cpp: In function 'vi countScans(vi, vi, vi)':
bubblesort2.cpp:59:22: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'long long unsigned int' [-Wsign-compare]
   59 |     for (ll i = 0; i < n+wh.size(); i++) redo(i);
      |                    ~~^~~~~~~~~~~~~

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