Submission #962971

#	Time	Username	Problem	Language	Result	Execution time	Memory
962971		raspy	Bank (IZhO14_bank)	C++14	100 / 100	167 ms	14552 KiB

bank

#include <iostream>
#include <vector>

using namespace std;

int a[25];
int b[25];
bool o[21][(1<<20)];
vector<int> gr[21];

void dfs(int n, int m, int ix, int ob)
{
	if (ix == n)
	{
		cout << "YES\n";
		exit(0);
	}
	if (o[ix][ob])
		return;
	o[ix][ob] = true;
	for (auto pr : gr[ix])
		if ((ob&pr) == 0)
			dfs(n, m, ix+1, ob|pr);
	return;
}

int main()
{
	int n, m;
	cin >> n >> m;
	for (int i = 0; i < n; i++)
		cin >> a[i];
	for (int i = 0; i < m; i++)
		cin >> b[i];
	for (int op = 0; op < (1<<m); op++)
	{
		int vs = 0;
		for (int i = 0; i < m; i++)
			if ((1<<i)&op)
				vs += b[i];
		for (int i = 0; i < n; i++)
			if (vs == a[i])
				gr[i].push_back(op);
	}
	dfs(n, m, 0, 0);
	cout << "NO" << "\n";
	return 0;
}

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29