Submission #831469

#	Time	Username	Problem	Language	Result	Execution time	Memory
831469		Chal1shkan	Bootfall (IZhO17_bootfall)	C++14	13 / 100	1076 ms	4532 KiB

bootfall

//Bismillahir-Rahmanir-Rahim

# include <bits/stdc++.h>

# define pb push_back
# define ff first
# define ss second
# define nl "\n"
# define sz(x) ((int)(x).size())
# define all(x) (x).begin(), (x).end()
# define deb(x) cerr << #x  << " = " << x << endl; 
# define pll pair <ll, ll>
# define pii pair <int, int>
 
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
 
const ll maxn = 5e2 + 3;
const ll inf = 2e18 + 0;
const ll mod = 1e9 + 7;
const ll dx[] = {-1, 1, 0, 0};
const ll dy[] = {0, 0, -1, 1};

using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

bitset <maxn * maxn * 2> dp[maxn], bs;
int sum[maxn];

void ma1n (/* SABR */) {
    int n;
    cin >> n;
    int a[n + 3];
    int qwe = 0; dp[0][0] = 1;
    for (int i = 1; i <= n; ++i) {
        cin >> a[i];
    	qwe += a[i];
		dp[0] |= (dp[0] << a[i]);
	}
	if (qwe & 1 || (dp[0][qwe / 2] == 0)) {
		cout << 0 << nl;
	}
	else {
	    for (int i = 1; i <= n; ++i) {
	    	dp[i][0] = 1;
	        for (int j = 1; j <= n; ++j) {
	            if (j != i) {
	                dp[i] |= (dp[i] << a[j]);
	                sum[i] += a[j];
	            }
	        }
	    }
	    vector <int> ans;
	    for (int x = 1; x <= 25000; ++x) {
	    	bool ok = 1;
	        for (int i = 1; i <= n; ++i) {
		        if ((sum[i] + x) & 1) {
		        	ok = 0;
		        	break;
				}
	            bs = dp[i] | (dp[i] << x);
	        	if (bs[(sum[i] + x) / 2] == 0) {
	        		ok = 0;
					break;
				}
			}
	        if (ok) {
	            ans.pb(x);
	        }
	    }
	    cout << sz(ans) << nl;
	    for (int x : ans) cout << x << ' '; 
	}
}
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
//  freopen("file.in", "r", stdin);
//  freopen("file.out", "w", stdout);
    int ttt = 1;
//  cin >> ttt;
    for (int test = 1; test <= ttt; ++test) {
//      cout << "Case " << test << ":" << '\n';
        ma1n();
    }
    return 0;
}

// 998batrr | BbIWEJI 3A TObOU!!!
// tourist  | BbIWEJI 3A TObOU!!!

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