#include #include #include using namespace atcoder; using mint = modint998244353; using namespace std; #define rep(i,n) for (int i = 0; i < (n); ++i) #define Inf32 1000000001 #define Inf64 1000000000000000001 template struct matrix{ vector> v; int _h,_w; matrix(vector> X){ v = X; _h = X.size(); _w = 0; if(X.size()>0)_w = X[0].size(); } matrix(int h,int w){ v.resize(h,vector(w,e0())); _h = h; _w = w; } void add_element(int from,int to,S x){ v[to][from] = op0(v[to][from],x); } matrix e(){ assert(_h==_w); matrix ret(_h,_w); for(int i=0;i<_h;i++){ for(int j=0;j<_w;j++){ if(i==j)ret.v[i][j] = e1(); else ret.v[i][j] = e0(); } } return ret; } matrix &operator*=(const matrix &another){ matrix ret(_h,another._w); for(int i=0;i<_h;i++){ for(int j=0;j ret = e(); auto temp = *this; while(cnt!=0LL){ if((cnt&1)==1){ ret *= temp; } temp *= temp; cnt>>=1; } return ret; } }; mint op0(mint a,mint b){ return a+b; } mint e0(){ return 0; } mint op1(mint a,mint b){ return a*b; } mint e1(){ return 1; } int main(){ int n,m,x; cin>>n>>m>>x; vector e(n,vector(n,0)); vector s(n); rep(i,m){ int a,b; cin>>a>>b; a--,b--; e[a][b]++; if(a!=b)e[b][a]++; s[a]++; if(a!=b)s[b]++; } if(s[0]==0){ cout<<1< A(X,X); rep(i,n){ rep(j,n){ rep(k,n){ int rem = e[j][k]; if(i==k)rem--; if(rem>0&&s[j]>=2)A.add_element(i*(n+1)+j, j*(n+1)+k, mint(rem)/mint(s[j]-1)); } if(s[i]!=0)A.add_element(n*(n+1)+i, i*(n+1)+j, mint(e[i][j])/mint(s[i])); if(s[j]==1 && e[j][i]==1){ A.add_element(i*(n+1)+j, n*(n+1)+j, 1); } } } A = A.pow(x); matrix B(X,1); B.v[n*(n+1)][0] = 1; B = A * B; rep(i,n){ mint sum = 0; rep(j,n+1){ sum += B.v[j*(n+1)+i][0]; } cout<