Cod sursa(job #3167038)

Utilizator mihaistamatescuMihai Stamatescu mihaistamatescu Data 9 noiembrie 2023 22:03:26
Problema Lista lui Andrei Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.78 kb
#include <fstream>

#define MOD 104659

using namespace std;

int n, m, d[1010][256];
char x, y;
bool a[256][256];

int main() {
    ifstream fin("nrcuv.in");
    ofstream fout("nrcuv.out");
    fin >> n >> m;
    for (int i = 1; i <= m; i++) {
        fin >> x >> y;
        a[x][y] = true;
    }
    for (int i = 'a'; i <= 'z'; i++) {
        d[1][i] = 1;
    }
    for (int i = 2; i <= n; i++) {
        for (int j = 'a'; j <= 'z'; j++) {
            for (int t = 'a'; t <= 'z'; t++) {
                if (!a[j][t] && !a[t][j]) {
                    d[i][t] += d[i - 1][j];
                    d[i][t] %= MOD;
                }
            }
        }
    }
    for (int i = 'b'; i <= 'z'; i++) {
        d[n]['a'] += d[n][i];
        d[n]['a'] %= MOD;
    }
    fout << d[n]['a'];
    return 0;
}