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Cod sursa(job #187795)
#include<fstream.h>
long x[1002][26],su;
int i,n,m,j,s,a[26][26];
char a1,a2;
ifstream f("lista.in");
ofstream g("lista.out");
int main()
{
f>>n>>m;
//f.get();
for( i=0;i<m;i++)
{
f>>a1;
f>>a2;
a[a1-'a'][a2-'a']=1;
a[a2-'a'][a1-'a']=1;
}
for(i=0;i<26;i++)
x[0][i]=1;
for(i=1;i<n;i++)
for(j=0;j<26;j++)
{
for(s=0;s<26;s++)
{
if(a[j][s]==0)
{
if(x[i][j]+x[i-1][s]<104659)
x[i][j]+=x[i-1][s];
else
x[i][j]=x[i-1][s]+x[i][j]-104659;
}
}
}
for(i=0;i<26;i++)
if(su+x[n-1][i]<104659)
su+=x[n-1][i];
else
su=su+x[n-1][i]-104659;
g<<su;
g.close();
return 0;
}