Submission #429893

#	Time	Username	Problem	Language	Result	Execution time	Memory
429893		Sundavar	Painting Walls (APIO20_paint)	C++14	0 / 100	1 ms	204 KiB

paint

#include "paint.h"

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


int minimumInstructions(int N, int M, int K, vector<int> C, vector<int> A, vector<vector<int>> B) {
  vector<vector<int> > colors(K);
  for(int i = 0; i < M; i++)
    for(int& a : B[i]) colors[a].push_back(i);
  map<int,int> last;
  vector<bool> start(N, false);
  for(int i = 0; i < N; i++){
    map<int,int> uj;
    for(int& a : colors[C[i]]){
      if(last.count((a+M-1)%M) > 0) uj[a] = 1 + last[(a+M-1)];
      else uj[a] = 1;
    }
    for(auto it = uj.begin(); it != uj.end(); it++)
      if(it->second >= M) start[i-M+1] = true;
    last = uj;
  }
  vector<int> best(N, -1e9);
  for(int i = 0; i < N; i++)
    best[i] = max((i > 0 ? best[i-1] : -1e9), (start[i] ? i : -1e9));
  int poz = 0, ans = 0;
  while(poz < N){
    if(poz - best[poz] >= M) return -1;
    poz = best[poz]+M, ans++;
  }
  return ans;
}

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