Cod sursa(job #3275087)

Utilizator maxtraAlex Deonise maxtra Data 9 februarie 2025 11:15:26
Problema Lista lui Andrei Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.17 kb
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#include <bits/stdc++.h>
#define mod 104659

using namespace std;

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

int n, m, fr[30][30], a[1005][30];

int main()
{
    f >> n >> m;
    for (int i = 0; i < m; i++) {
        char l1, l2;
        
        f >> l1 >> l2;
        
        fr[l1 - 'a'][l2 - 'a'] = 1;
        fr[l2 - 'a'][l1 - 'a'] = 1;
    }
    
    for (int i = 0; i < 26; i++) {
        a[0][i] = 1;
    }
    
    for (int i = 1; i <= n; i++) {
        for (int j = 0; j < 26; j++) {
            for (int k = 0; k < 26; k++) {
                if (fr[j][k] != 1 && fr[k][j] != 1)
                    a[i][j] = (a[i][j] + a[i - 1][k]) % mod;
            }
        }
    }
    
    long long int sum = 0;
    for (int i = 0; i < 26; i++) {
        sum = (a[n-1][i] + sum) % mod;
    }
    
    g << sum;
    
    return 0;
}