Submission #391205

#	Time	Username	Problem	Language	Result	Execution time	Memory
391205		AlexPop28	Packing Biscuits (IOI20_biscuits)	C++14	0 / 100	1085 ms	20712 KiB

biscuits

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

using namespace std;

int n;

map<pair<int, long long>, long long> memo;
long long Solve(int i, const vector<long long> &cnt, long long s) {
  if (memo.count({i, s})) return memo[{i, s}];
  if (i == (int)cnt.size()) {
    // cerr << "br 1: " << s << '\n';
    return 1LL;
  }

  long long ret;
  ret = Solve(i + 1, cnt, (s + cnt[i]) / 2);
  if (s + cnt[i] >= n) {
    ret += Solve(i + 1, cnt, (s + cnt[i] - n) / 2);
  }
  return memo[{i, s}] = ret; 
}

long long count_tastiness(long long n, vector<long long> a) {
  ::n = n;
  long long s = 0;
  for (int i = 0; i < (int)a.size(); ++i) {
    if (a[i] > n + 1) {
      if (i + 1 == (int)a.size()) a.emplace_back(0LL);
      auto delta = (a[i] - n) / 2;
      a[i + 1] += delta;
      a[i] -= 2 * delta;
    }
    s += a[i] << i;
    // cerr << a[i] << ' ';
  }
  // cerr << endl;
  memo.clear();
  return Solve(0, a, 0);
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 12
• Subtask 3: 0 / 21
• Subtask 4: 0 / 35
• Subtask 5: 0 / 23