Submission #1129882

#	Time	Username	Problem	Language	Result	Execution time	Memory
1129882		am_aadvik	Snake Escaping (JOI18_snake_escaping)	C++20	65 / 100	2044 ms	22460 KiB

snake_escaping

#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("Os")
#pragma unroll
#include <vector>
#include<cstdio>
#include<iostream>
using namespace std;

int main(){
	int t = 1;
	while (t--) {
		int n, q; string s;
		cin >> n >> q >> s;
		vector<int> arr(1 << n), sub(1 << n), sup(1 << n);
		for (int i = 0; i < (1 << n); ++i)
			arr[i] = (s[i] - '0');

		vector<int> cur(1 << n), prv = arr;
		for (int x = 1; x <= n; ++x) {
			for (int m = 0; m < (1 << n); ++m) {
				cur[m] = prv[m];
				if (m & (1 << (x - 1))) cur[m] += prv[m - (1 << (x - 1))];
			}
			prv = cur;
		}

		sub = prv, prv = arr;
		for (int x = 1; x <= n; ++x) {
			for (int m = (1 << n) - 1; m >= 0; --m) {
				cur[m] = prv[m];
				if (!(m & (1 << (x - 1)))) cur[m] += prv[m + (1 << (x - 1))];
			}
			prv = cur;
		}
		sup = prv;

		vector<int> a, b, c;
		while (q--) {
			cin >> s;
			for (int i = 0; i < n / 2; ++i) swap(s[i], s[n - i - 1]);
			for (int i = 0; i < n; ++i)
				if (s[i] == '?') c.push_back(i);
				else if (s[i] == '1') b.push_back(i);
				else a.push_back(i);

			if (c.size() <= 6) {
				int ans = 0, o = 0;
				for (auto x : b) o += (1 << x);
				for (int i = 0; i < (1 << c.size()); ++i) {
					int v = 0;
					for (int j = 0; j < c.size(); ++j)
						if (i & (1 << j))
							v += (1 << c[j]);
					ans += arr[o + v];
				}
				cout << ans << "\n";
			}
			else if (a.size() <= 6) {
				int ans = 0, o = 0;
				for (auto x : b) o += (1 << x);
				for (int i = 0; i < (1 << a.size()); ++i) {
					int v = 0, sz = 0;
					for (int j = 0; j < a.size(); ++j)
						if (i & (1 << j))
							v += (1 << a[j]), sz++;
					ans += (sup[o | v] * ((sz & 1) ? -1 : 1));
				}
				cout << ans << "\n";
			}
			else {
				int ans = 0, o = 0;
				for (auto x : c) o += (1 << x);
				for (int i = 0; i < (1 << b.size()); ++i) {
					int v = 0, sz = 0;
					for (int j = 0; j < b.size(); ++j)
						if (i & (1 << j))
							v += (1 << b[j]), sz++;
					ans += (sub[o | v] * (((b.size() - sz) & 1) ? -1 : 1));
				}
				cout << ans << "\n";
			}
			a.clear(), b.clear(), c.clear();
		}
	}
}

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