제출 #391643

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
391643		MrDomino	벽 칠하기 (APIO20_paint)	C++14	28 / 100	1591 ms	19396 KiB

paint

#include <bits/stdc++.h>
#include "paint.h"

using namespace std;

int sum(int a, int b) {
  return a * b;
}

mt19937 rng((long long) (new char));

const int INF = (int) 1e9;

int minimumInstructions(int n, int m, int k, vector<int> c, vector<int> a, vector<vector<int>> b) {
  vector<int> can(n, 0);
  vector<set<int>> match(m);
  vector<vector<int>> guys(k);
  for (int i = 0; i < m; i++) {
    for (auto &j : b[i]) {
      match[i].insert(j);
      guys[j].push_back(i);
    }
  }
  for (int i = 0; i + m - 1 < n; i++) {
    /// can[i] = 1?
    int raz = rng() % m;
    for (auto &val : guys[c[i + raz]]) {
      int x = (val - raz + m) % m;
      assert(x >= 0);
      bool good = 1;
      for (int l = 0; l < m; l++) {
        if (!match[(x + l) % m].count(c[i + l])) {
          good = 0;
          break;
        }
      }
      if (good) {
        can[i] = 1;
        break;
      }
    }
  }
  { /// shift can by 1
    reverse(can.begin(), can.end());
    can.push_back(0);
    reverse(can.begin(), can.end());
  }
  vector<int> dp(n + 1, INF);
  dp[0] = 0;
  for (int i = m; i <= n; i++) {
    /// finish at position i => I've started at position i-k+1
    int start = i - m + 1;
    if (!can[start]) {
      continue;
    }
    for (int lastend = start - 1; lastend <= i - 1; lastend++) {
      dp[i] = min(dp[i], dp[lastend] + 1);
    }
  }
  if (dp[n] == INF) {
    dp[n] = -1;
  }
  return dp[n];
}

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