Submission #311829

#	Time	Username	Problem	Language	Result	Execution time	Memory
311829		MarcoMeijer	Bubble Sort 2 (JOI18_bubblesort2)	C++14	100 / 100	5143 ms	166368 KiB

bubblesort2

#include "bubblesort2.h"
#include <bits/stdc++.h>
using namespace std;
 
// macros
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> lll;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vll;
typedef vector<lll> vlll;
#define REP(a,b,c) for(int a=int(b); a<int(c); a++)
#define RE(a,c) REP(a,0,c)
#define RE1(a,c) REP(a,1,c+1)
#define REI(a,b,c) REP(a,b,c+1)
#define REV(a,b,c) for(int a=int(c-1); a>=int(b); a--)
#define FOR(a,b) for(auto& a : b)
#define all(a) a.begin(), a.end()
#define INF 1e9
#define EPS 1e-9
#define pb push_back
#define popb pop_back
#define fi first
#define se second
#define sz size()
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
 
const int H=20;
const int N=(1<<H);

vi A, X, V;
vi dif;
int seg[N*2], laz[N];

void apply(int p, int v) {
    seg[p] += v;
    if(p < N) laz[p] += v;
}
void build(int p) {
    while(p>1) p/=2, seg[p]=max(seg[p*2],seg[p*2+1])+laz[p];
}
void push(int p) {
    REV(s,1,H+1) {
        int i=p>>s;
        apply(i*2  ,laz[i]);
        apply(i*2+1,laz[i]);
        laz[i] = 0;
    }
}
void add(int l, int r, int v) {
    int l0=l+=N, r0=r+=N;
    for(; l<r; l/=2, r/=2) {
        if(l&1) apply(l++,v);
        if(r&1) apply(--r,v);
    }
    build(l0);
    build(r0-1);
}
int get(int l, int r) {
    l+=N; r+=N;
    push(l);
    push(r-1);
    int res=0;
    for(; l<r; l/=2, r/=2) {
        if(l&1) res += seg[l++];
        if(r&1) res += seg[--r];
    }
    return res;
}

map<int,set<int>> mp;
void update(int i, int v) {
    add(A[i],N,-v);
    if(v == 1) {
        if(!mp[A[i]].empty())
            add(A[i],A[i]+1,-*prev(mp[A[i]].end()));
        mp[A[i]].insert(i);
        add(A[i],A[i]+1, *prev(mp[A[i]].end()));
    } else {
        add(A[i],A[i]+1,-*prev(mp[A[i]].end()));
        mp[A[i]].erase(i);
        if(!mp[A[i]].empty())
            add(A[i],A[i]+1, *prev(mp[A[i]].end()));
    }
}

vi countScans(vi _A, vi _X, vi _V){
    A=_A; X=_X; V=_V;
    int n=A.size();
	int q=X.size();
	vi ans(q);
 
    RE(i,n) dif.pb(A[i]);
    RE(i,q) dif.pb(V[i]);
    sort(all(dif));
    dif.erase(unique(all(dif)), dif.end());
    RE(i,n) A[i] = lower_bound(all(dif), A[i])-dif.begin();
    RE(i,q) V[i] = lower_bound(all(dif), V[i])-dif.begin();

    add(0,N,1);
    RE(i,n) update(i,1);

    RE(j,q) {
        update(X[j],-1);
        A[X[j]] = V[j];
        update(X[j], 1);

        ans[j] = get(0,N);
    }
 
	return ans;
}

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