Submission #501605

#	Time	Username	Problem	Language	Result	Execution time	Memory
501605		shmad	Bootfall (IZhO17_bootfall)	C++17	6 / 100	1089 ms	8260 KiB

bootfall

#include <bits/stdc++.h>

#define int long long
#define vt vector
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
#define ff first
#define ss second
#define dbg(x) cerr << #x << " = " << x << '\n'

using namespace std;
using ll = long long;
using pii = pair<int, int>;
using vvi = vt< vt<int> >;

const int N = 1e6 + 5, mod = 1e9 + 7, inf = 1e18 + 7, B = 500, LIM = (1ll << 60);
const double eps = 1e-6;

template<class Iterator> std::ostream& print_range(std::ostream& os, Iterator begin, Iterator end) {
    os << "{";
    for (auto it = begin; it != end; os << *it++) if (it != begin) os << ", ";
    return os << "}";
}
 
template<class X> std::ostream& operator<<(std::ostream& os, const std::vector<X>& vec) {
    return print_range(os, all(vec));
}

int dp[N];

void solve () {
	int n;
	cin >> n;
	vt<int> a(n + 1);
	int sum = 0;
	for (int i = 1; i <= n; i++) cin >> a[i], sum += a[i];
	if (n & 1) cout << "0\n", exit(0);
	set<int> ans;
	vt<int> used(N, 0);
	dp[0] = 1;
	for (int val = 1; val <= 2500; val++) {
		for (int i = 1; i <= n; i++) {
			int x = a[i], s = sum - a[i];
			a[i] = val;
			s += a[i];
			if (s & 1) {
				a[i] = x;
				continue;
			}
			for (int j = 1; j <= n; j++) {
				for (int w = s - a[j]; w >= 0; w--) {
					if (dp[w] == 1) dp[w + a[j]] = 1;
				}
			}
			if (dp[s / 2] == 1) {
            	used[val]++;
            	if (used[val] >= n) ans.insert(val);
            }
			a[i] = x;
			for (int j = 1; j <= s; j++) dp[j] = 0;
		}
	}
	cout << sz(ans) << '\n';
	for (auto x: ans) cout << x << ' ';
	cout << '\n';
}

bool testcases = 0;
                  
signed main() {
    cin.tie(0) -> sync_with_stdio(0);
    int test = 1;
    if (testcases) cin >> test;
    for (int cs = 1; cs <= test; cs++) {
        solve();
    }
}

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