Submission #866961

#	Time	Username	Problem	Language	Result	Execution time	Memory
866961		Halym2007	Bootfall (IZhO17_bootfall)	C++11	28 / 100	1060 ms	49204 KiB

bootfall

#include <bits/stdc++.h>
using namespace std;
#define ll long long
const int N = 5e2 + 5;
const int NN = 500*500 + 5;
#define pb push_back
#define sz size()
#define ff first
#define ss second

vector <int> v, jog;
int n, a[N], dp[NN], san[NN], sum;
map <int, bool> m[NN];
int main () {
//	freopen("input.txt", "r", stdin);
//	freopen ("cykar.txt", "w", stdout);
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> n;
	for (int i = 1; i <= n; ++i) {
		cin >> a[i];
		sum += a[i];
	}
//	for (int i = 1; i <= n; ++i) {
//		cout << a[i] << " ";
//	}
//	return 0;
	dp[0] = 1;
	for (int i = 1; i <= n; ++i) {
		for (int j = sum - a[i]; j >= 0; j--) {
			if (dp[j]) {
				dp[j + a[i]] = 1;
				m[j + a[i]][a[i]] = 1;
				for (auto jj : m[j]) {
					m[j + a[i]][jj.ff] = 1; 
				}
			}
		}
	}
	if (sum % 2 == 1 or !dp[sum / 2]) {
		cout << "0\n";
		return 0;
	}
	for (int i = 0; i <= sum; ++i) {
		if (dp[i]) {
			v.pb (i);
		}
	}
	for (int i = 1; i <= n; ++i) {
		map <int, bool> mp;
		for (int j : v) {
			// j we sum - j
			int grup1 = j;
			int grup2 = sum - j;
			if (m[grup1].find(a[i]) != m[grup1].end()) {
				int sum1 = grup1 - a[i];
				int variant = abs(sum1 - grup2);
				if (mp.find (variant) == mp.end()) {
					san[variant]++;
					mp[variant] = 1;	
				}
			}
		}
	}
	for (int i = 0; i <= sum; ++i) {
		if (san[i] == n) {
			jog.pb (i);
		}
	}
	cout << (int)jog.sz << "\n";
	for (int i : jog) {
		cout << i << " ";
	}
}

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