Nu aveti permisiuni pentru a descarca fisierul grader_test8.ok

Cod sursa(job #3141272)

Utilizator MAlex2019Melintioi George Alexandru MAlex2019 Data 13 iulie 2023 13:55:04
Problema Lista lui Andrei Scor 45
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.93 kb
#include <iostream>
#include <fstream>
#include <set>

using namespace std;

ifstream fin("nrcuv.in");
ofstream fout("nrcuv.out");

const long long mod = 104659;
const int maxn = 1e3;
long long dp[maxn + 1][26];
bool rules[26][26];

int main() {
    for (int i = 0; i < 26; i++)
        for (int j = 0; j < 26; j++)
            rules[i][j] = true;

    int n, m;
    fin >> n >> m;
    for (int i = 0; i < m; i++) {
        char x, y;
        fin >> x >> y;
        rules[x - 'a'][y - 'a'] = rules[y - 'a'][x - 'a'] = false;
    }

    for (int i = 0; i < 26; i++)
        dp[1][i] = 1;
    for (int i = 2; i <= n; i++)
        for (int j = 0; j < 26; j++)
            for (int k = 0; k < 26; k++)
                if (rules[j][k])
                    dp[i][j] = (dp[i][j] + dp[i - 1][k]) % mod;
    long long ans = 0;
    for (int i = 0; i < 26; i++)
        ans += dp[n][i];
    fout << ans << '\n';

    return 0;
}