int n,m,k;Mint a;Comb<Mint> c;
{rd(n,m,k);rep(i,1,n+1)if(i*2<=n+m-k&&i<=m)a+=c.fac(n-1)*c.fac(m)*c.C(n,i)*c.C(m-1,m-i);wt(a);}