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Cod sursa(job #891415)
#include <fstream>
using namespace std;
bool m[26][26];
int main()
{
int v=26,i,n,l,pos=0;
int x,y;
char a,b;
ifstream fin("nrcuv.in");
ofstream fout("nrcuv.out");
fin>>l>>n;
for(i=0;i<n;i++)
{
fin>>a>>b;
x=a-'a';y=b-'a';
if(!m[x][y])
{
if(a==b)pos++;
else
pos+=2;
m[x][y]=1;
m[y][x]=1;
}
}
while(l>1)
{
v=v*26-pos;
v=v%104659;
l--;
}
fout<<v;
}