제출 #934392

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
934392		sysia	Cubeword (CEOI19_cubeword)	C++17	0 / 100	1156 ms	19928 KiB

cubeword

//Sylwia Sapkowska
#include <bits/stdc++.h>
#pragma GCC optimize("O3", "unroll-loops")
using namespace std;

void __print(int x) {cerr << x;}
void __print(long long x) {cerr << x;}
void __print(long double x) {cerr << x;}
void __print(char x) {cerr << "'" << x << "'";}
void __print(const char *x) {cerr << '"' << x << '"';}
void __print(const string &x) {cerr << '"' << x << '"';}
void __print(bool x) {cerr << (x ? "true" : "false");}

template<typename T, typename V>
void __print(const pair<T, V> &x) {cerr << '{'; __print(x.first); cerr << ", "; __print(x.second); cerr << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cerr << '{'; for (auto &i: x) cerr << (f++ ? ", " : ""), __print(i); cerr << "}";}
void _print() {cerr << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cerr << ", "; _print(v...);}
#ifdef LOCAL
#define debug(x...) cerr << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif

#define int long long
typedef pair<int, int> T;
const int oo = 1e18, oo2 = 1e9+7, K = 30;
const int mod = 998244353;
const int A = 11, mx = 76;

int mul(int a, int b){
    return (a*b)%mod;
}

void add(int &a, int b){
    a += b;
    if (a >= mod) a-= mod;
}

void solve(){
    int n; cin >> n;
    vector cnt(A, vector<vector<int>>(mx, vector<int>(mx)));
    set<string>a;
    for (int i = 0; i<n; i++){
        string s; cin >> s;
        int l = (int)s.size();
        if (a.find(s) == a.end()){
            a.insert(s);
            cnt[l][s[0]-'0'][s.back()-'0']++;
        }
        auto t = s;
        reverse(t.begin(), t.end());
        if (a.find(t) == a.end()) {
            cnt[l][s.back()-'0'][s[0]-'0']++;
            a.insert(t);    
        }
    }
    int ans = 0;
    vector zlicz(mx, vector<vector<int>>(mx, vector<int>(mx)));
    for (int rep = 3; rep < A; rep++){
        debug(rep);
        for (int a = 0; a < mx; a++){
            for (int b = 0; b < mx; b++){
                for (int c = 0; c < mx; c++){
                    zlicz[a][b][c] = 0;
                }
            }
        }
        for (int beg = 0; beg < mx; beg++){
            for (int a = 0; a < mx; a++){
                for (int b = 0; b < mx; b++){
                    for (int c = 0; c < mx; c++){
                        add(zlicz[a][b][c], mul(cnt[rep][beg][a], mul(cnt[rep][beg][b], cnt[rep][beg][c])));
                    }
                }
            }
        }
        for (int a = 0; a < mx; a++){
            for (int b = 0; b < mx; b++){
                for (int c = 0; c < mx; c++){
                    for (int d = 0; d < mx; d++){
                        add(ans, mul(mul(zlicz[a][b][c], zlicz[a][c][d]), mul(zlicz[b][c][d], zlicz[a][b][d])));
                    }
                }
            }
        }
    }
    cout << ans << "\n";
}

int32_t main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    solve();

    return 0;
}

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