Submission #539185

#	Time	Username	Problem	Language	Result	Execution time	Memory
539185		vector	Rope (JOI17_rope)	C++17	100 / 100	1384 ms	134064 KiB

rope

#include<bits/stdc++.h>
#define SIZE 1000001
using namespace std;
int N,M,A[SIZE],B[SIZE],C[SIZE],D[SIZE],ans[SIZE],mx;
bool vis[SIZE];
vector<int>v1[SIZE],v2[SIZE];
int main()
{
    ios_base::sync_with_stdio(0),cin.tie(0);
    cin>>N>>M;
    for(int i=1;i<=N;i++){
        cin>>A[i];
        B[A[i]]++;
    }
    for(int i=1;i<=M;i++){
        C[B[i]]++;
        mx=max(mx,B[i]);
        ans[i]=1e9;
    }
    for(int i=1;i<N;i+=2){
        v1[A[i]].push_back(A[i+1]);
        v1[A[i+1]].push_back(A[i]);
    }
    for(int i=1;i<=M;i++){
        int mx1=mx;
        vector<int>u;
        u.push_back(i);
        for(int j:v1[i]){
            u.push_back(j);
            D[j]++;
        }
        D[i]=B[i];
        for(int j:u)if(!vis[j]){
            C[B[j]-D[j]]++;
            C[B[j]]--;
            vis[j]=true;
        }
        while(!C[mx1])mx1--;
        for(int j:u){
            C[B[j]-D[j]]--;
            D[j]=0,vis[j]=false;
            C[B[j]]++;
        }
        ans[i]=min(ans[i],N-B[i]-mx1);
    }
    for(int i=2;i<N;i+=2){
        v2[A[i]].push_back(A[i+1]);
        v2[A[i+1]].push_back(A[i]);
    }
    for(int i=1;i<=M;i++){
        int mx1=mx;
        vector<int>u;
        u.push_back(i);
        for(int j:v2[i]){
            u.push_back(j);
            D[j]++;
        }
        D[i]=B[i];
        for(int j:u)if(!vis[j]){
            C[B[j]-D[j]]++;
            C[B[j]]--;
            vis[j]=true;
        }
        while(!C[mx1])mx1--;
        for(int j:u){
            C[B[j]-D[j]]--;
            D[j]=0,vis[j]=false;
            C[B[j]]++;
        }
        ans[i]=min(ans[i],N-B[i]-mx1);
        printf("%d\n",ans[i]);
    }
}

• Subtask 1: 15 / 15
• Subtask 2: 30 / 30
• Subtask 3: 10 / 10
• Subtask 4: 25 / 25
• Subtask 5: 20 / 20