Submission #502029

#	Time	Username	Problem	Language	Result	Execution time	Memory
502029		syrtin	Bootfall (IZhO17_bootfall)	C++17	13 / 100	1083 ms	720 KiB

bootfall

#include <bits/stdc++.h>
#define pb push_back
#define all(v) v.begin(),v.end()
#define ff first
#define ss second
using namespace std;
typedef long long ll;
typedef pair<long long, long long> pll;
typedef pair < int, int > pii;
typedef vector<int> vi;
typedef vector<long long> vll;
const int N = 250000 / 2 + 1;
const ll mod = 1e9 + 7;
void solve(){
	int n;
	cin >> n;
	int a[n], x = 0;
	bitset<N> can;
	bool ok = 0, okk = 0;
	for(int i = 0; i < n; i++) {
		cin >> a[i];
		if(a[i] % 2)ok = 1;
		else okk = 1;
		x += a[i];
	}
	map<int, bool> hv;
	hv[0] = 1;
	for(int j = 0; j < n; j++) {
		vi ev;
		for(auto o : hv) {
			ev.pb(o.ff + a[j]);
		}
		for(auto o : ev)hv[o] = 1;
	}
	if(x % 2 || hv.find(x / 2) == hv.end() || ok & okk) {
		cout << "0";
		return;
	}
	x -= a[0];
	if(x % 2)ok = 1;
	else ok = 0;
	for(int i = 0; i < N; i++) can[i] = 1;
	for(int i = 0; i < n; i++) {
		hv.clear();
		x = 0;
		hv[0] = 1;
		for(int j = 0; j < n; j++) {
			if(j == i)continue;
			vi ev;
			for(auto o : hv) {
				ev.pb(o.ff + a[j]);
			}
			for(auto o : ev)hv[o] = 1;
			x += a[j];
		}
		for(int p = can._Find_first(); p != can.size(); p = can._Find_next(p)) {
			int t = p * 2 + ok;
			if(hv.find((x + t) / 2) == hv.end() && hv.find((x + t) / 2 - t) == hv.end()) can[p] = 0;
		}
	}
	cout << can.count() << '\n';
		for(int p = can._Find_first(); p != can.size(); p = can._Find_next(p)) {
			cout << p * 2 + ok << ' ';
		}	
}
int main() {
    //freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
	ios_base::sync_with_stdio(false);
	cin.tie(0);
    int times = 1;
	//cin >> times;
    while(times--)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