Submission #1169402

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1169402	2025-03-18 16:04:50	mnbvcxz123	Bootfall (IZhO17_bootfall)	C++20	100 / 100	743 ms	1064 KiB

bootfall

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
constexpr int N = 500 * 250 + 5;
constexpr int M = 500 * 500 + 5;
int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  cout.tie(nullptr);
  int n;
  cin >> n;
  vector<int> a(n);
  for (auto &u : a)
    cin >> u;
  int tot = accumulate(a.begin(), a.end(), 0);
  auto get = [&] (int ban) {
    bitset<N> ret;
    ret[0] = 1;
    for (int i = 0; i < n; i++) {
      if (i == ban) continue;
      ret |= ret << a[i];
    }
    return ret;
  };
  auto ini = get(-1);
  if (tot&1 or !ini[tot>>1])
    return cout << "0", 0;
  bitset<M> df;
  df.set();
 
 
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• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 21 / 21
• Subtask 6: 35 / 35