Submission #287314

#	Time	Username	Problem	Language	Result	Execution time	Memory
287314		luciocf	Snake Escaping (JOI18_snake_escaping)	C++14	12 / 100	406 ms	20220 KiB

snake_escaping

#include <bits/stdc++.h>

using namespace std;

const int maxn = 10;

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

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

		for (int outro = 1; outro < (1<<n); outro++)
		{
			int b;
			for (int l = 0; l < n; l++)
			{
				if (outro&(1<<l))
				{
					b = l;
					break;
				}
			}

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

	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";
	}
}

Compilation message (stderr)

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:30:8: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
   30 |    int b;
      |        ^

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 0 / 10
• Subtask 4: 0 / 53
• Subtask 5: 0 / 25