Cod sursa(job #2704051)

Utilizator costea_dariaCostea Daria Ioana costea_daria Data 9 februarie 2021 18:24:34
Problema Lista lui Andrei Scor 0
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.84 kb
#include <fstream>

using namespace std;

ifstream f("nrcuv.in");
ofstream g("nrcuv.out");

const int mod = 104659;
int mat[27][27];
long long dp[1001][27];

int main(){
    int n, m;

    in >> n >> m;
    for(int i = 0; i < m; i++){
        char x, y;
        in >> x >> y;
        mat[x - 'a'][y - 'a'] = mat[y - 'a'][x - 'a'] = 1;
    }

    for(int i = 0; i < 26; i++){
        dp[0][i] = 1;
    }

    for(int i = 1; i < n; i++){
        for(int j = 0; j < 26; j++){
            for(int k = 0; k < 26; k++){
                if(!mat[j][k]){
                    dp[i][j] += dp[i - 1][k];
                    dp[i][j] %= mod;
                }
            }
        }
    }

    long long suma = 0;
    for(int i = 0; i < 26; i++){
        suma += dp[n - 1][i];
        suma %= mod;
    }

    out << suma;
}