Cod sursa(job #2476924)

Utilizator raduT2003RaduHandru raduT2003 Data 19 octombrie 2019 12:38:18
Problema Lista lui Andrei Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.91 kb
#include <iostream>
#include <fstream>
#define NMAX 1005
#define CMAX 150
#define MOD 104659

using namespace std;

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

int dp[NMAX][CMAX], n, k, mat[CMAX][CMAX];

int main()
{
    f >> n >> k;

    for(int i = 1 ; i <= k ; i++)
    {
        char a, b;
        f >> a >> b;
        mat[a][b] = mat[b][a] = 1;
    }
    for(int i = 'a'; i <= 'z' ; i++)
        dp[1][i] = 1; // exista un string

    for(int i = 2 ; i<= n ; i++)
        for(int a = 'a'; a <= 'z'; a++)
            for(int b = 'a'; b <= 'z'; b++)
                if(mat[a][b] == 0)
                {
                    dp[i][b] += dp[i - 1][a];
                    dp[i][b] %= MOD;
                }

    int ans = 0;

    for(int i = 'a'; i <= 'z' ; i++)
    {
        ans += dp[n][i];
        ans %= MOD;
    }

    g << ans;
    f.close();
    g.close();
    return 0;
}