Cod sursa(job #2476912)

Utilizator csamoilasamoila ciprian casian csamoila Data 19 octombrie 2019 12:33:31
Problema Lista lui Andrei Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.81 kb
#include <iostream>
#include <fstream>
#define NMAX 1005
#define CMAX 150
#define MOD 104659

using namespace std;

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

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

int main()
{
    fin >> n >> k;
    for(int i=1;i<=k;i++){
        char a,b;
        fin >> a >> b;
        mat[a][b]=mat[b][a]=1;
    }
    for(int i='a';i<='z';i++){
        dp[1][i]=1;
    }
    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;
    }
    fout << ans;
}