Cod sursa(job #3281986)

Utilizator zavragiudavid dragoi zavragiu Data 4 martie 2025 11:44:14
Problema Lista lui Andrei Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.85 kb
#include <bits/stdc++.h>
using namespace std;

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

int n, m, dp[1002][1002]; /// dp[i][j] = nr de cuvinte de i litere care se termina cu j
bool mat[30][30];
int fr[30];
const int mod = 104659;

int main()
{
    int i, j;
    char a, b;
    fin >> n >> m;
    for(i = 1; i <= m; i++)
    {
        fin >> a >> b;
        fr[a - 'a']++;
        fr[b - 'b']++;
        mat[a - 'a'][b - 'a'] = mat[b - 'a'][a - 'a'] = 1;
    }
    for(i = 0; i < 26; i++)
        dp[1][i] = 1;
    for(i = 1; i <= n; i++)
        for(j = 0; j < 26; j++)
            for(int k = 0; k < 26; k++)
                if(mat[j][k] == 0)
                    dp[i][j] = (dp[i][j] + dp[i-1][k]) % mod;
    int ans = 0;
    for(i = 0; i < 26; i++)
        ans = (ans + dp[n][i]) % mod;
    fout << ans;
    return 0;
}