Submission #1040503

#	Time	Username	Problem	Language	Result	Execution time	Memory
1040503		anton	Cubeword (CEOI19_cubeword)	C++17	0 / 100	1177 ms	177064 KiB

cubeword

#include<bits/stdc++.h>

using namespace std;
#define int long long
#define pii pair<int, int>

const int MOD = 998244353LL;
const int MAX_N = 40LL;
int nbP[MAX_N][MAX_N];
int RES = 0;

vector<pii> cube_edges = {
{0, 1},
{1, 2},
{2, 3},
{3, 0},
{4, 5},
{5, 6},
{6, 7},
{7, 4},
{0, 4},
{1, 5}, 
{2, 6},
{3, 7},
};


bool is_palindrome(string s){
    bool ok = true;
    for(int i = 0; i<(s.size()+1)/2; i++){
        ok &= (s[i] == s[s.size()-i-1]);
    }
    return ok;
}

vector<vector<int>> iterate_all(int nbSteps, int maxC){
    vector<int> cur = vector<int>(nbSteps, 0);
    vector<vector<int>> res;

    bool ok = true;
    while(ok){
        cur.back()++;
        for(int i = nbSteps-1; i>0; i--){
            if(cur[i]>=maxC){
                cur[i-1]++;
                cur[i] = 0;
            }
        }

        if(cur[0] >=maxC){
            ok = false;
            cur[0] = 0;
        }
        res.push_back(cur);
    }
    return res;
}

signed main(){
    int N;
    cin>>N;
    vector<string> words;

    for(int i = 0; i<N; i++){
        string s;
        cin>>s;
        words.push_back(s);
    }

    for(int len = 3; len<=10; len++){
        fill(&nbP[0][0], &nbP[MAX_N][0], 0);


        int max_c= 2;
        for(auto e: words){
            if(e.size() == len){
                int a=  e[0]-'a';
                int b= e.back()-'a';
                max_c = max(max_c, a+1);
                max_c=  max(max_c, b+1);
                if(is_palindrome(e)){
                    nbP[a][b]++;
                }
                else{
                    nbP[a][b]++;
                    nbP[b][a]++;
                }
            }
        }

        for(auto list: iterate_all(8, max_c)){
            int nb_cur = 1;
            for(auto edge: cube_edges){
                nb_cur = (nb_cur * nbP[list[edge.first]][list[edge.second]])%MOD;
            }
            RES += nb_cur;
        }
    }

    cout<<RES<<endl;
}

Compilation message (stderr)

cubeword.cpp: In function 'bool is_palindrome(std::string)':
cubeword.cpp:30:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for(int i = 0; i<(s.size()+1)/2; i++){
      |                    ~^~~~~~~~~~~~~~~
cubeword.cpp: In function 'int main()':
cubeword.cpp:76:25: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   76 |             if(e.size() == len){
      |                ~~~~~~~~~^~~~~~

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