Submission #425562

#	Time	Username	Problem	Language	Result	Execution time	Memory
425562		hhhhaura	Cubeword (CEOI19_cubeword)	C++14	0 / 100	1112 ms	15756 KiB

cubeword

#define wiwihorz
#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma loop-opt(on)

#define rep(i, a, b) for(int i = a; i <= b; i++)
#define rrep(i, a, b) for(int i = b; i >= a; i--)
#define ceil(a, b) ((a + b - 1) / (b))
#define all(x) x.begin(), x.end()

#define INF 1000000000000000000
#define eps (1e-9)

using namespace std;
#define int long long int
#define lld long double
#define pii pair<int, int>
#define random mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count())

#ifdef wiwihorz
#define print(a...) kout("[" + string(#a) + "] = ", a)
void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
void kout() { cerr << endl; }
template<class T1, class ... T2> void kout(T1 a, T2 ... e) { cerr << a << " ", kout(e...); }
#else
#define print(...) 0
#define vprint(...) 0
#endif
namespace solver {
	const int P = 6, MOD = 998244353;
	int ans = 0;
	vector<vector<int>> cnt[11];
	vector<int> cur;
	set<string> st;
	vector<pii> edge = {
		{0, 1}, {0, 4}, {0, 2},
		{1, 5}, {1, 3}, {2, 3},
		{2, 6}, {3, 7}, {5, 7},
		{5, 4}, {6, 7}, {4, 6}
	};
	void init_() {
		rep(i, 0, 10) 
			cnt[i].assign(P, vector<int>(P, 0));
		cur.assign(8, 0);
		ans = 0, st.clear();
	}
	int count() {
		int a = 0, c;
		rep(i, 3, 10) {
			c = 1;
			for(auto j : edge) {
				c = c * cnt[i][cur[j.first]][cur[j.second]] % MOD;
				if(!c) break;
			}
			a = (a + c);
			if(a >= MOD) a -= MOD;
		}
		return a;
	}
	void solve() {
		for(cur[0] = 0; cur[0] < P; cur[0] ++)
		for(cur[1] = 0; cur[1] < P; cur[1] ++)
		for(cur[2] = 0; cur[2] < P; cur[2] ++)
		for(cur[3] = 0; cur[3] < P; cur[3] ++)
		for(cur[4] = 0; cur[4] < P; cur[4] ++)
		for(cur[5] = 0; cur[5] < P; cur[5] ++)
		for(cur[6] = 0; cur[6] < P; cur[6] ++)
		for(cur[7] = 0; cur[7] < P; cur[7] ++) {
			ans = (ans + count());
			if(ans >= MOD) ans -= MOD;
		}
	}
};
using namespace solver;
signed main() {
	ios::sync_with_stdio(false), cin.tie(0);
	int n; cin >> n;
	init_();
	rep(i, 1, n) {
		string s, s1; cin >> s;
		int sz = s.size();
		if(st.find(s) == st.end()) 
			cnt[sz][s[0] - 'a'][s.back() - 'a'] ++;
		st.insert(s);
		s1 = s, reverse(all(s1));
		if(st.find(s1) == st.end()) 
			cnt[sz][s1[0] - 'a'][s1.back() - 'a'] ++;
		st.insert(s1);
	}
	solve();
	cout << ans << "\n"; 
	return 0;
} 

Compilation message (stderr)

cubeword.cpp:4: warning: ignoring '#pragma loop ' [-Wunknown-pragmas]
    4 | #pragma loop-opt(on)
      | 
cubeword.cpp:22:13: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   22 | void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
      |             ^~~~
cubeword.cpp:22:21: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   22 | void vprint(auto L, auto R) {while(L < R) cerr << *L << " \n"[next(L) == R], ++L;}
      |                     ^~~~

• Subtask 1: 0 / 21
• Subtask 2: 0 / 29
• Subtask 3: 0 / 34
• Subtask 4: 0 / 16