제출 #947524

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
947524		GrindMachine	Cubeword (CEOI19_cubeword)	C++17	21 / 100	1163 ms	11140 KiB

cubeword

#pragma GCC optimize("O3,unroll-loops")

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 998244353;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

void solve(int test_case)
{
    ll n; cin >> n;
    vector<string> a(n);
    rep(i,n) cin >> a[i];
    rep(i,n){
        auto s = a[i];
        reverse(all(s));
        a.pb(s);
    }

    sort(all(a));
    a.resize(unique(all(a))-a.begin());
    n = sz(a);

    vector<char> b;
    trav(s,a){
        trav(ch,s){
            b.pb(ch);
        }
    }

    sort(all(b));
    b.resize(unique(all(b))-b.begin());
    ll alpha = sz(b);

    ll cnt[15][alpha][alpha];
    memset(cnt,0,sizeof cnt);
    rep(i,n){
        auto &s = a[i];
        ll x = lower_bound(all(b),s[0])-b.begin();
        ll y = lower_bound(all(b),s.back())-b.begin();
        cnt[sz(s)][x][y]++;
    }

    ll ans = 0;
    ll dp[4][alpha][alpha];

    for(int len = 3; len <= 10; ++len){
        auto &f = cnt[len];
        rep(sx,alpha){
            rep(sy,alpha){
                if(!f[sx][sy]) conts;

                memset(dp,0,sizeof dp);
                dp[0][sx][sy] = f[sx][sy];
                rep(i,3){
                    rep(x,alpha){
                        rep(y,alpha){
                            rep(x2,alpha){
                                rep(y2,alpha){
                                    dp[i+1][x2][y2] += dp[i][x][y]*f[x][x2]%MOD*f[y][y2]%MOD*f[x2][y2];
                                    dp[i+1][x2][y2] %= MOD;
                                }
                            }
                        }
                    }
                }

                rep(x,alpha){
                    rep(y,alpha){
                        ll add = dp[3][x][y]*f[x][sx]%MOD*f[y][sy]%MOD;
                        ans = (ans+add)%MOD;
                    }
                }
            }
        }
    }

    cout << ans << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

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