Cod sursa(job #1479669)

Utilizator eu3neuomManghiuc Teodor-Florin eu3neuom Data 31 august 2015 20:44:35
Problema Lista lui Andrei Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.92 kb
#include <iostream>
#include <fstream>
#include <bitset>

using namespace std;

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

const int Sigma = 26;
const int NMax = 1005;
const int MOD = 104659;

int v[NMax][Sigma];

bitset < Sigma > mat[Sigma];

int main(){
    int n, m, ans;
    char a, b;
    fin >> n >> m;
    for(int i = 1; i <= m; i++){
        fin >> a >> b;
        mat[a - 'a'][b - 'a'] = mat[b - 'a'][a - 'a'] = 1;
    }
    for(int i = 0; i < Sigma; i++){
        v[1][i] = 1;
    }
    for(int i = 2; i <= n; i++){
        for(int j = 0; j < Sigma; j++){
            for(int k = 0; k < Sigma; k++){
                if(!mat[j][k] && !mat[k][j]){
                    v[i][j] = (v[i][j] + v[i - 1][k]) % MOD;
                }
            }
        }
    }
    ans = 0;
    for(int i = 0; i < Sigma; i++){
        ans = (ans + v[n][i]) % MOD;
    }
    fout << ans;
    return 0;
}