Submission #625440

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
625440	2022-08-10 11:40:10	model_code	Prisoner Challenge (IOI22_prison)	C++17	100 / 100	11 ms	980 KiB

prison

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#include "prison.h"
#include <cassert>
#include <vector>
std::vector<std::vector<int>> devise_strategy(int N) {
  std::vector<int> dp = {2}, best = {0};
  for (int i = 1; dp.back() < N; ++i) {
    dp.push_back(2);
    best.push_back(0);
    for (int j = 1; j <= i; ++j) {
      int cur = dp[i - j] * j + 2;
      if (cur > dp[i]) {
        dp[i] = cur;
        best[i] = j;
      }
    }
  }
  int x = (int)dp.size() - 1;
  int cover = dp[x];
  std::vector<int> divide;
  int now = x;
  while (now > 0) {
    divide.push_back(best[now]);
    now -= best[now];
  }
  std::vector<std::vector<int>> ret(x + 1);
  for (int i = 0; i <= x; ++i) {
    ret[i].assign(cover+1, 0);
  }
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 90 / 90