Submission #1131161

#	Time	Username	Problem	Language	Result	Execution time	Memory
1131161		Tsagana	Bootfall (IZhO17_bootfall)	C++20	13 / 100	1 ms	328 KiB

bootfall

#include<bits/stdc++.h>

#define IOS ios_base::sync_with_stdio(false);cin.tie();cout.tie();
#define all(x) x.begin(), x.end()
#define int long long
#define pq priority_queue
#define eb emplace_back
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define pp pop_back
#define F first
#define S second

using namespace std;

vector<int> ans;
int dp[2501];
int a[501];

void solve () {
	int n, s = 0; cin >> n;

	for (int i = 1; i <= 2500; i++) ans.pb(i);

	dp[0] = 1;
	for (int i = 0; i < n; i++) {
		cin >> a[i];
		for (int j = 2500; j >= a[i]; j--) dp[j] += dp[j - a[i]];
		s += a[i];
	}

	if (s % 2 || dp[s / 2] == 0) {cout << 0; return ;}

	for (int i = 0; i < n; i++) {
		s -= a[i];
		for (int j = a[i]; j <= 2500; j++) dp[j] -= dp[j - a[i]];

		int j = 0;
		while (j < ans.size()) {
			if (s < ans[j] || (s - ans[j]) % 2 || !dp[(s - ans[j]) / 2]) {
				if (j < ans.size()) swap(ans[j], ans[ans.size()-1]);
				ans.pp();
			} else j++;
		}
		s += a[i];
		for (int j = 2500; j >= a[i]; j--) dp[j] += dp[j - a[i]];
	}

	sort(all(ans));
	cout << ans.size() << '\n';
	for (int i: ans) cout << i << ' ';
}
signed main() {IOS solve(); return 0;}

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 0 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 21
• Subtask 6: 0 / 35