Pagini recente » Cod sursa (job #2774010) | Cod sursa (job #1111351) | Cod sursa (job #1193118) | Cod sursa (job #562993) | Cod sursa (job #2849349)
#include <fstream>
#define MOD 104659
using namespace std;
ifstream fin("nrcuv.in");
ofstream fout("nrcuv.out");
int n, m, a[30][30], sol;
int dp[1001][27];
char x, y;
int main()
{
fin>>n>>m;
for(int i=1;i<=m;i++)
{
fin>>x>>y;
a[x-'a'+1][y-'a'+1]=1;
a[y-'a'+1][x-'a'+1]=1;
}
for(int i=1;i<=26;i++)
dp[1][i]=1;
for(int i=2;i<=n;i++)
{
for(int j=1;j<=26;j++)
{
for(int k=1;k<=26;k++)
{
if(a[j][k]==0)
{
dp[i][j]=(dp[i][j]+dp[i-1][k])%MOD;
}
}
}
}
for(int i=1;i<=26;i++)
{
sol=(sol+dp[n][i])%MOD;
}
fout<<sol%104659;
return 0;
}