Submission #582463

#	Time	Username	Problem	Language	Result	Execution time	Memory
582463		penguinhacker	Snake Escaping (JOI18_snake_escaping)	C++17	100 / 100	935 ms	39200 KiB

snake_escaping

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define ar array

int n, q, sub[1<<20], super[1<<20];
string s;

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> n >> q >> s;
	for (int i=0; i<1<<n; ++i)
		sub[i]=super[i]=s[i]-'0';
	for (int j=0; j<n; ++j)
		for (int i=0; i<1<<n; ++i) {
			if (i&1<<j)
				sub[i]+=sub[i^(1<<j)];
			else
				super[i]+=super[i^(1<<j)];
		}
	while(q--) {
		string t;
		cin >> t;
		reverse(t.begin(), t.end());
		if (count(t.begin(), t.end(), '?')<=6) {
			int a=0, b=0;
			for (int i=0; i<n; ++i) {
				if (t[i]=='?')
					b|=1<<i;
				else if (t[i]=='1')
					a|=1<<i;
			}
			int ans=s[a]-'0';
			for (int c=b; c; c=b&(c-1))
				ans+=s[a|c]-'0';
			cout << ans << "\n";
		} else if (count(t.begin(), t.end(), '1')<=6) {
			int a=0, b=0;
			for (int i=0; i<n; ++i) {
				if (t[i]=='?')
					a|=1<<i;
				else if (t[i]=='1')
					b|=1<<i;
			}
			int ans=sub[a|b];
			for (int c=b; c; c=b&(c-1))
				ans+=(__builtin_popcount(c)%2?-1:1)*sub[(a|b)^c];
			cout << ans << "\n";
		} else {
			int a=0, b=0;
			for (int i=0; i<n; ++i) {
				if (t[i]=='1')
					a|=1<<i;
				else if (t[i]=='0')
					b|=1<<i;
			}
			int ans=super[a];
			for (int c=b; c; c=b&(c-1))
				ans+=(__builtin_popcount(c)%2?-1:1)*super[a|c];
			cout << ans << "\n";
		}
	}
	return 0;
}

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