Cod sursa(job #2667063)

Utilizator rapidu36Victor Manz rapidu36 Data 2 noiembrie 2020 20:06:52
Problema Lista lui Andrei Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.98 kb
#include <fstream>

using namespace std;

const int N = 1001;
const int NL = 26;
const int M = 104659;

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

int dp[N][NL];
bool inco[NL][NL];

int main()
{
    int n, m;
    in >> n >> m;
    for (int i = 0; i < m; i++)
    {
        char c1, c2;
        in >> c1 >> c2;
        inco[c1 - 'a'][c2 - 'a'] = inco[c2 - 'a'][c1 - 'a'] = true;
    }
    in.close();
    for (int j = 0; j < NL; j++)
    {
        dp[1][j] = 1;
    }
    for (int i = 2; i <= n; i++)
    {
        for (int j = 0; j < NL; j++)
        {
            for (int k = 0; k < NL; k++)
            {
                if (!inco[j][k])
                {
                    dp[i][j] += dp[i - 1][k];
                    dp[i][j] %= M;
                }
            }
        }
    }
    int rez = 0;
    for (int j = 0; j < NL; j++)
    {
        rez += dp[n][j];
        rez %= M;
    }
    out << rez;
    out.close();
    return 0;
}