Submission #287343

#TimeUsernameProblemLanguageResultExecution timeMemory
287343luciocfSnake Escaping (JOI18_snake_escaping)C++14
12 / 100
487 ms65540 KiB
#include <bits/stdc++.h>

using namespace std;

const int maxn = 13;

int n, q;
char v[1<<maxn];

int b[1<<maxn];

unordered_map<int, int> dp[1<<maxn];

int main(void)
{
	ios::sync_with_stdio(false); cin.tie(0);

	cin >> n >> q;

	for (int i = 0; i < (1<<n); i++)
	{
		cin >> v[i];
		v[i] = (int)(v[i]-'0');
	}

	for (int i = 1; i < (1<<n); i++)
	{
		for (int j = 0; j < n; j++)
		{
			if (i&(1<<j))
			{
				b[i] = j;
				break;
			}
		}
	}

	for (int fixo = (1<<n)-1; fixo >= 0; fixo--)
	{
		dp[fixo][0] = v[fixo];

		int mask = ((1<<n)-1)^fixo;

		vector<int> sub;

		for (int outro = mask; outro > 0; outro = (outro-1)&mask)
			sub.push_back(outro);

		reverse(sub.begin(), sub.end());

		for (auto outro: sub)
			dp[fixo][outro] = dp[fixo][outro^(1<<b[outro])] + dp[fixo|(1<<b[outro])][outro^(1<<b[outro])];
	}

	while (q--)
	{
		int fixo = 0, outro = 0;

		for (int i = 0; i < n; i++)
		{
			char c;
			cin >> c;

			if (c == '?') outro += (1<<(n-i-1));
			else if (c == '1') fixo += (1<<(n-i-1));
		}

		cout << dp[fixo][outro] << "\n";
	}
}
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