Submission #982718

#	Time	Username	Problem	Language	Result	Execution time	Memory
982718		Marcus	Painting Walls (APIO20_paint)	C++17	28 / 100	1592 ms	6672 KiB

paint

#include "paint.h"
#include <vector>
#include <bits/stdc++.h>
using namespace std;

int n, m, k;
const int INF = 1e5+1;


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;
    vector<bool> p(n);
    for (int y=0; y<=n-m; y++)
    {
      bool valy = false;
      for (int x=0; x<m && !valy; x++)
      {
        //checking
        bool valx = true;
        for (int l=0; l<m && valx; l++)
        {
          int segment = y+l;
          int painter = (x+l)%m;
          bool match = false;
          for (auto u: B[painter]) {if (C[segment] == u) match = true;}
          if (!match) valx = false;
          //if (y == 0 && x == 1) 
          //{
          //  cout<<segment<<" "<<painter<<"\n";
          //  for (auto u: B[painter]) {cout<<u<<" ";} cout<<"\n";
          //}
        }
        if (valx) {valy = true;}
      }
      if (valy) {p[y] = true; continue;}
    }
    //for (auto &u: B) {for (auto &v: u) {cout<<v<<" ";} cout<<'\n';}
    //for (auto u: p) {cout<<u<<" ";} cout<<'\n';

    vector<int> left(n);
    if (p[0]) left[0] = 0;
    else left[0] = -INF;
    for (int i=1; i<n; i++)
    {
      if (p[i]) left[i] = i;
      else left[i] = left[i-1];
    }
    //for (auto u: left) {cout<<u<<" ";} cout<<"\n";

    vector<int> g(n);
    for (int i=n-1; i>=0; i--)
    {
      //cout<<left[i]+m-1<<"\n";
      if (i - left[i] >= m) {g[i] = INF;}
      else if (left[i] != -INF && left[i]+m >= n) {g[i] = 1;}
      else if (left[i] != -INF && left[i]+m < n) {g[i] = 1 + g[left[i]+m];}
    }
    //for (auto u: g) {cout<<u<<" ";} cout<<"\n";


    return ((g[0] >= INF) ? -1 : g[0]);
}

• Subtask 1: 0 / 12
• Subtask 2: 15 / 15
• Subtask 3: 13 / 13
• Subtask 4: 0 / 23
• Subtask 5: 0 / 37