Submission #709272

#	Time	Username	Problem	Language	Result	Execution time	Memory
709272		vjudge1	Homework (CEOI22_homework)	C++17	0 / 100	43 ms	22484 KiB

Main

#include<bits/stdc++.h>

#define x first
#define y second
#define sz(v) (int)v.size()
#define pb push_back
#define nl "\n"

using namespace std;

const int N = (int)1e6 + 7;
const int inf = (int)1e9 + 7;
     
int n, pos[N], p[N], e[N];
bool dp[139][16][1 << 16];
string s;

void calc(int v, int l, int r) {
	if(l == r) {
		for(int i = 0; i < n; ++i) {
			dp[v][i][1 << i] = 1;
		}
		return;
	}		
	bool tp = (s[l + 1] == 'a');                 
	int mid = e[l];
	calc(v * 2, l + 4, mid - 1);
	calc(v * 2 + 1, mid + 1, r - 1);
	for(int mask = 0; mask < (1 << n); ++mask) {
		int msk = (((1 << n) - 1) ^ mask);
		for(int s = msk; s; s = (s - 1) & msk) {
			for(int x = 0; x < n; ++x) {
				for(int y = 0; y < n; ++y) {
					dp[v][(tp ? max(x, y) : min(x, y))][mask | s] |= (dp[v * 2][x][mask] & dp[v * 2 + 1][y][s]);		
				}
			}
		}
	}
}

int main() {
	ios_base::sync_with_stdio(NULL);
	cin.tie(0);
	cin >> s;
	for(int i = 0; i < sz(s); ++i) {
		if(s[i] == '?') {
			pos[i] = ++n;
		}
	}
	stack<int> st;
	for(int i = 0; i < sz(s); ++i) {
		if(s[i] == 'm') st.push(i);		
		if(s[i] == ',') {
			assert(!st.empty());
			e[st.top()] = i;
			st.pop();
		}
	}
	calc(1, 0, sz(s) - 1);
	int ans = 0;
	for(int i = 0; i < n; ++i) ans += dp[1][i][(1 << n) - 1];
	cout << ans;
	return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 13
• Subtask 3: 0 / 13
• Subtask 4: 0 / 30
• Subtask 5: 0 / 34