Submission #851755

#	Time	Username	Problem	Language	Result	Execution time	Memory
851755		vjudge1	Bubble Sort 2 (JOI18_bubblesort2)	C++17	22 / 100	6291 ms	68768 KiB

bubblesort2

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define endl '\n'
#define FF first
#define SS second
#define all(a) a.begin(), a.end()
#define mod (ll)(1000000007)
int pr=23, s_p=1<<pr, e_p=(1<<(pr+1))-1;
int n;
vector<int>S_sum;

void pre(){
    S_sum.clear();
    S_sum.resize(1<<(pr+1));
}

void update(int ind, int c){
    S_sum[ind]+=c;
    while(ind/=2)
        S_sum[ind]+=c;
}

int get(int id, int u, int v, int l, int r){
    if(l>v || r<u)
        return 0;
    if(l>=u && r<=v)
        return S_sum[id];
    int md=(l+r)/2;
    return get(id*2, u, v, l, md)+get(id*2+1, u, v, md+1, r);
}

vector<int> countScans(vector<int>A, vector<int>X, vector<int>V){
    vector<int>S, All, Cur(A.size());
    n=A.size();
    int q=X.size();
    for(int i=0;i<n;i++){
        All.push_back(A[i]);
    }
    for(int i=0;i<q;i++){
        All.push_back(V[i]);
    }
    sort(all(All));
    int cur=1;
    map<int, int>mp;
    for(int i=0;i<All.size();i++){
        if(i==All.size()-1 || All[i]!=All[i+1])
            mp[All[i]]=cur++;
    }
    for(int i=0;i<n;i++){
        A[i]=mp[A[i]];
    }
    pre();
    for(int i=0;i<n;i++){
        int cur=get(1, s_p+A[i]+1, e_p, s_p, e_p);
        Cur[i]=cur;
        update(s_p+A[i], 1);
    }
    for(int i=0;i<n;i++){
        update(s_p+A[i], -1);
    }
    for(int k=0;k<q;k++){
        int ind=X[k], val=V[k];
        bool larger=(val>A[ind]);
        int mx=0, inc=0;
        for(int i=0;i<ind;i++){
            if(!larger){
                inc+=(A[i]<=A[ind] && A[i]>val);
            }
            else{
                inc-=(A[i]>A[ind] && A[i]<=val);
            }
        }
        Cur[ind]+=inc;
        for(int i=ind+1;i<n;i++){
            if(!larger){
                Cur[i]-=(A[i]<A[ind] && A[i]>=val);
            }
            else{
                Cur[i]+=(A[i]<val && A[i]>=A[ind]);
            }
        }
        A[ind]=val;
        for(int i=0;i<n;i++){
            mx=max(mx, Cur[i]);
        }
        S.push_back(mx);
    }
    return S;
}

//int main(){
//    ios_base::sync_with_stdio(0);cin.tie(0);
//    int n, q;
//    cin>>n>>q;
//    vector<int>A(n), X(q), V(q);
//    for(int i=0;i<n;i++){
//        cin>>A[i];
//    }
//    for(int j=0;j<q;j++){
//        cin>>X[j]>>V[j];
//    }
//    vector<int>Ans=countScans(A, X, V);
//    for(int i=0;i<q;i++){
//        cout<<Ans[i]<<endl;
//    }
//}

Compilation message (stderr)

bubblesort2.cpp: In function 'std::vector<int> countScans(std::vector<int>, std::vector<int>, std::vector<int>)':
bubblesort2.cpp:46:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     for(int i=0;i<All.size();i++){
      |                 ~^~~~~~~~~~~
bubblesort2.cpp:47:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |         if(i==All.size()-1 || All[i]!=All[i+1])
      |            ~^~~~~~~~~~~~~~

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