Submission #1109581

#	Time	Username	Problem	Language	Result	Execution time	Memory
1109581		koukirocks	Cubeword (CEOI19_cubeword)	C++17	84 / 100	292 ms	14396 KiB

cubeword

#include <bits/stdc++.h>
#define speed ios_base::sync_with_stdio(0); cin.tie(0)
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx,avx2")
//#pragma GCC target("popcnt")
 
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
 
const ll MAX=2e5+10,P=998244353;
const ll INF=0x3f3f3f3f,oo=0x3f3f3f3f3f3f3f3f;
const ldb eps=1e-6;
const ldb PI=acos(-1.0);
const int dir[4][2]={{0,1},{0,-1},{1,0},{-1,0}};
// const string ct="abcdef";
// const string ct="abcdefghijklmnop";
const string ct="abcdefghijklmnopABCDEFGHIJKLMNOP";
// const string ct="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
const int cs = ct.size();
template<typename T>
using vvector = vector<vector<T>>;

ll cnt[128][128];
ll cnt3[70][70][70];
ll solve(vector<string> &ss) {
    sort(all(ss));
    ss.resize(unique(all(ss))-ss.begin());
    memset(cnt,0,sizeof(cnt));
    for (auto s:ss) {
        cnt[s[0]][s.back()]++;
    }
    memset(cnt3,0,sizeof(cnt3));
    for (int i=0;i<cs;i++) {
        for (int j=i;j<cs;j++) {
            for (int k=j;k<cs;k++) {
                ll ans=0;
                for (int l=0;l<cs;l++) {
                    ans+=cnt[ct[i]][ct[l]]*cnt[ct[j]][ct[l]]%P*cnt[ct[k]][ct[l]]%P;
                    ans%=P;
                }
                cnt3[i][j][k]=ans;
            }
        }
    }
    auto srt = [&](int a,int b,int c,int d) {
        array<int,4> ans={a,b,c,d};
        sort(all(ans));
        return ans;
    };
    ll ans=0;
    for (int i=0;i<cs;i++) {
        for (int j=0;j<cs;j++) {
            for (int k=0;k<cs;k++) {
                for (int l=0;l<cs;l++) {
                    ll now=1;
                    auto [ni,nj,nk,nl] = srt(i,j,k,l);
                    now*=cnt3[ni][nj][nk];
                    now%=P;
                    now*=cnt3[ni][nj][nl];
                    now%=P;
                    now*=cnt3[ni][nk][nl];
                    now%=P;
                    now*=cnt3[nj][nk][nl];
                    now%=P;
                    ans+=now;
                    ans%=P;
                }
            }
        }
    }
    return ans;
}

int main() {
    speed;
    int n;
    vector<string> l[11];
    cin>>n;
    for (int i=0;i<n;i++) {
        string s;
        cin>>s;
        l[s.size()].push_back(s);
        reverse(all(s));
        l[s.size()].push_back(s);
    }
    ll ans=0;
    for (int k=3;k<=10;k++) {
        // cout<<k<<" k\n"<<flush;
        ans+=solve(l[k]);
        ans%=P;
    }
    cout<<ans<<"\n";
    return 0;
}

Compilation message (stderr)

cubeword.cpp: In function 'll solve(std::vector<std::__cxx11::basic_string<char> >&)':
cubeword.cpp:38:17: warning: array subscript has type 'char' [-Wchar-subscripts]
   38 |         cnt[s[0]][s.back()]++;
      |                 ^
cubeword.cpp:38:25: warning: array subscript has type 'char' [-Wchar-subscripts]
   38 |         cnt[s[0]][s.back()]++;
      |                   ~~~~~~^~
cubeword.cpp:46:35: warning: array subscript has type 'char' [-Wchar-subscripts]
   46 |                     ans+=cnt[ct[i]][ct[l]]*cnt[ct[j]][ct[l]]%P*cnt[ct[k]][ct[l]]%P;
      |                                   ^
cubeword.cpp:46:42: warning: array subscript has type 'char' [-Wchar-subscripts]
   46 |                     ans+=cnt[ct[i]][ct[l]]*cnt[ct[j]][ct[l]]%P*cnt[ct[k]][ct[l]]%P;
      |                                          ^
cubeword.cpp:46:53: warning: array subscript has type 'char' [-Wchar-subscripts]
   46 |                     ans+=cnt[ct[i]][ct[l]]*cnt[ct[j]][ct[l]]%P*cnt[ct[k]][ct[l]]%P;
      |                                                     ^
cubeword.cpp:46:60: warning: array subscript has type 'char' [-Wchar-subscripts]
   46 |                     ans+=cnt[ct[i]][ct[l]]*cnt[ct[j]][ct[l]]%P*cnt[ct[k]][ct[l]]%P;
      |                                                            ^
cubeword.cpp:46:73: warning: array subscript has type 'char' [-Wchar-subscripts]
   46 |                     ans+=cnt[ct[i]][ct[l]]*cnt[ct[j]][ct[l]]%P*cnt[ct[k]][ct[l]]%P;
      |                                                                         ^
cubeword.cpp:46:80: warning: array subscript has type 'char' [-Wchar-subscripts]
   46 |                     ans+=cnt[ct[i]][ct[l]]*cnt[ct[j]][ct[l]]%P*cnt[ct[k]][ct[l]]%P;
      |                                                                                ^

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