Cod sursa(job #1458069)

Utilizator EpictetStamatin Cristian Epictet Data 6 iulie 2015 14:33:48
Problema Lista lui Andrei Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.9 kb
#include <fstream>

#define Lit_Max 27
#define N_max 1010
#define MOD 104659

using namespace std;

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

int N, M, sol;
int F[Lit_Max][Lit_Max], DP[Lit_Max][N_max];

int main()
{
    fin >> N >> M;
    while (M--)
    {
        char c1, c2;
        fin.get();
        fin.get(c1); c1 -= 'a' - 1;
        fin.get();
        fin.get(c2); c2 -= 'a' - 1;

        F[c1][c2] = F[c2][c1] = 1;
    }

    for (int i = 1; i < Lit_Max; i++) DP[i][1] = 1;

    for (int i = 2; i <= N; i++)
    {
        for (int j = 1; j < Lit_Max; j++)
        {
            for (int k = 1; k < Lit_Max; k++)
            {
                if (!F[j][k])
                {
                    DP[j][i] = (DP[j][i] + DP[k][i - 1]) % MOD;
                }
            }
        }
    }

    for (int i = 1; i < Lit_Max; i++) sol = (sol + DP[i][N]) % MOD;

    fout << sol << '\n';
    return 0;
}