ll@c,@n,@m;
Matrix<Mint>a(4,4);
a[0...3][0..3]=0;
Mint ic=Mint(1)/Mint(c);
a[0][0]=ic;
a[0][1]=1-ic;
a[1][2]=1;
a[2][2]=ic;
a[2][3]=1-ic;
a[3][0]=Mint(1)/Mint(c-1);
a[3][2]=1-Mint(1)/Mint(c-1);
Mint p=(a**n)[0][0];
wt(1-(1-p)**m);