Cod sursa(job #1123259)

Utilizator raulstoinStoin Raul raulstoin Data 25 februarie 2014 23:56:47
Problema Lista lui Andrei Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.63 kb
#include<fstream>
#include<set>

#define NMAX 1005
#define MOD 104659

using namespace std;

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

int n,m,DP[NMAX][26],sol;
set<short> ban[26];

int main()
{
	fin>>n>>m;
	char c1,c2;
	for(int i=1;i<=m;i++)
	{
		fin>>c1>>c2;
		ban[c1-'a'].insert(c2-'a');
		ban[c2-'a'].insert(c1-'a');
	}
	for(int i=0;i<26;i++)
		DP[1][i]=1;
	for(int i=2;i<=n;i++)
		for(int j=0;j<26;j++)
		{
			for(int k=0;k<26;k++)
				if(ban[j].find(k)==ban[j].end())
					DP[i][j]+=DP[i-1][k];
			DP[i][j]%=MOD;
		}
	for(int i=0;i<26;i++)
		sol+=DP[n][i];
	fout<<sol%MOD;
	return 0;
}