Submission #954211

#	Time	Username	Problem	Language	Result	Execution time	Memory
954211		vjudge1	Painting Walls (APIO20_paint)	C++17	100 / 100	349 ms	14516 KiB

paint

#include "paint.h"
#include<bits/stdc++.h>
using namespace std;
const int maxn=100000+10;
int n,m,k;
vector<int>allk[maxn];
int len[maxn],last[maxn],fakelast[maxn],fakelen[maxn];

int minimumInstructions(int N, int M, int K, std::vector<int> C,
    std::vector<int> A, std::vector<std::vector<int>> B) {
    n=N;
    m=M;
    k=K;
    for(int i=0;i<m;i++){
        for(auto x:B[i]){
            allk[x].push_back(i);
        }
    }
    vector<int>res(n+2);
    for(int i=0;i<maxn;i++){
        last[i]=n;
    }
    for(int i=n-1;i>=0;i--){
        for(auto x:allk[C[i]]){
            fakelast[x]=i;
            if(last[(x+1)%m]!=i+1){
                fakelen[x]=1;
            }else{
                fakelen[x]=min(m,len[(x+1)%m]+1);
            }
        }
        for(auto x:allk[C[i]]){
            last[x]=fakelast[x];
            len[x]=fakelen[x];
            if(len[x]==m){
                res[i]=1;
            }
        }
    }
//    for(int i=0;i<n;i++){
  //      cout<<i<<" "<<res[i]<<"\n";
   // }
    int ted=0;
    if(res[0]==0){
        return -1;
    }
    int mx=-1,fakemx=-1;
    while(mx!=n-1){
 //       cout<<mx<<" "<<fakemx<<endl;
        ted++;
        fakemx=max(fakemx,res[mx+1]*m+mx);
        if(fakemx==mx){
            return -1;
        }
        int j=mx;
        mx=fakemx;
        for(;j<=mx;j++){
            fakemx=max(fakemx,res[j+1]*m+j);
        }
    }
    return ted;
}

• Subtask 1: 12 / 12
• Subtask 2: 15 / 15
• Subtask 3: 13 / 13
• Subtask 4: 23 / 23
• Subtask 5: 37 / 37