Submission #1270896

#	Time	Username	Problem	Language	Result	Execution time	Memory
1270896		sitablechair	Bubble Sort 2 (JOI18_bubblesort2)	C++20	0 / 100	9091 ms	1980 KiB

bubblesort2

#include <bits/stdc++.h>
#include "bubblesort2.h"

#define ll long long
#define ldb long double
#define endl '\n'
#define For(i,l,r) for(int i=l;i<=r;i++)
#define ForD(i,r,l) for(int i=r;i>=l;i--)
#define ff first
#define ss second
#define pb push_back
#define all(x) x.begin(),x.end()
#define sz(x) (signed)x.size()
#define unq(x) x.resize(unique(all(x))-x.begin())
#define F "TASK"
#define fio freopen(F".INP","r",stdin);freopen(F".OUT","w",stdout);


using namespace std;

const int N=5e5+3;

int n,a[N],b[N],sf[N];
vector<pair<int,int>> vt;
vector<int> countScans(vector<int> A,vector<int> X,vector<int> V) {
    n=sz(A);
    vector<int> res;
    For(i,1,n) a[i]=A[i-1];
    For(i,0,sz(X)-1) {
        int x=X[i],v=V[i];
        x++;
        a[x]=v;
        sf[n+1]=2e9;
        vt.clear();
        For(j,1,n) vt.pb({a[j],j});
        sort(all(vt));
        For(j,1,n) b[vt[j-1].ss]=j;
        ForD(j,n,1) sf[j]=max(sf[j],b[j]);
        int ans=0;
        For(j,1,n) {
            int f=0;
            if (j<n && b[n]>b[j]) {
                int l=j+1,r=n;
                while(l<r) {
                    int mid=l+(r-l)/2;
                    if (sf[mid]>b[j]) r=mid;
                    else l=mid+1;
                }
                f=l;
            }
            ans=max(ans,n-b[j]-(n-f+1));
        }
        res.pb(ans);
    }
    return res;
}

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