#include <bits/stdc++.h>
#define ll long long
#define INF 1000000005
#define MOD 1000000007
#define EPS 1e-10
#define rep(i,n) for(int i=0;i<(int)(n);++i)
#define rrep(i,n) for(int i=(int)(n)-1;i>=0;--i)
#define srep(i,s,t) for(int i=(int)(s);i<(int)(t);++i)
#define each(a,b) for(auto& (a): (b))
#define all(v) (v).begin(),(v).end()
#define len(v) (int)(v).size()
#define zip(v) sort(all(v)),v.erase(unique(all(v)),v.end())
#define cmx(x,y) x=max(x,y)
#define cmn(x,y) x=min(x,y)
#define fi first
#define se second
#define pb push_back
#define show(x) cout<<#x<<" = "<<(x)<<endl
#define spair(p) cout<<#p<<": "<<p.fi<" "<<p.se<<endl
#define sar(a,n) cout<<#a<<":";rep(pachico,n)cout<<" "<<a[pachico];cout<<endl
#define svec(v) cout<<#v<<":";rep(pachico,v.size())cout<<" "<<v[pachico];cout<<endl
#define svecp(v) cout<<#v<<":";each(pachico,v)cout<<" {"<<pachico.first<<":"<<pachico.second<<"}";cout<<endl
#define sset(s) cout<<#s<<":";each(pachico,s)cout<<" "<<pachico;cout<<endl
#define smap(m) cout<<#m<<":";each(pachico,m)cout<<" {"<<pachico.first<<":"<<pachico.second<<"}";cout<<endl

using namespace std;

typedef pair<int,int> P;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<double> vd;
typedef vector<P> vp;
typedef vector<string> vs;

const int MAX_N = 151;

template<typename T> class mat : public vector<vector<T> > {
private:
    int r,c;    //行,列
public:
    int row() const {
        return r;
    }
    int column() const {
        return c;
    }
    mat(int n,int m,T val = 0){
        this->r = n,this->c = m;
        rep(i,n){
            this->push_back(vector<T>(m,val));
        }
    }
    mat operator+(const mat& another){
        if(this->r != another.r && this->c != another.c){
            cout << "足し算失敗(サイズ不一致)" << endl;
            exit(1);
        }
        mat<T> X(this->r,this->c);
        rep(i,this->r){
            rep(j,this->c){
                X[i][j] = (*this)[i][j] + another[i][j];
            }
        }
        return X;
    }
    mat operator+(const T val){
        mat<T> X(this->r,this->c);
        rep(i,this->r){
            rep(j,this->c){
                X[i][j] = (*this)[i][j] + val;
            }
        }
        return X;
    }
    mat operator-(const mat& another){
        if(this->r != another.r && this->c != another.c){
            cout << "引き算失敗(サイズ不一致)" << endl;
            exit(1);
        }
        mat<T> X(this->r,this->c);
        rep(i,this->r){
            rep(j,this->c){
                X[i][j] = (*this)[i][j] - another[i][j];
            }
        }
        return X;
    }
    mat operator-(const T val){
        mat<T> X(this->r,this->c);
        rep(i,this->r){
            rep(j,this->c){
                X[i][j] = (*this)[i][j] - val;
            }
        }
        return X;
    }
    vector<T> operator*(const vector<T>& another){
        if(this->c != (int)another.size()){
            cout << "掛け算失敗(サイズ不一致)" << endl;
            exit(1);
        }
        vector<T> vec(this->r,0);
        rep(i,this->r){
            rep(j,this->c){
                vec[i] += (*this)[i][j] * another[j];
            }
        }
        return vec;
    }
    mat operator*(const mat& another){
        if(this->c != another.r){
            cout << "掛け算失敗(サイズ不一致)" << endl;
            exit(1);
        }
        mat<T> X = *this;
        rep(i,this->r){
            for(int k=0;k<this->c;k+=4){
                for(int j=0;j<another.c;j+=2){
					if((*this)[i][k]){
						if(another[k][j]){
							cmx(X[i][j],(*this)[i][k]+another[k][j]);
						}
						if(another[k][j+1]){
							cmx(X[i][j+1],(*this)[i][k]+another[k][j+1]);
						}
					}
					if((*this)[i][k+1]){
						if(another[k+1][j]){
							cmx(X[i][j],(*this)[i][k+1]+another[k+1][j]);
						}
						if(another[k+1][j+1]){
							cmx(X[i][j+1],(*this)[i][k+1]+another[k+1][j+1]);
						}
					}
					if((*this)[i][k+2]){
						if(another[k+2][j]){
							cmx(X[i][j],(*this)[i][k+2]+another[k+2][j]);
						}
						if(another[k+2][j+1]){
							cmx(X[i][j+1],(*this)[i][k+2]+another[k+2][j+1]);
						}
					}
					if((*this)[i][k+3]){
						if(another[k+3][j]){
							cmx(X[i][j],(*this)[i][k+3]+another[k+3][j]);
						}
						if(another[k+3][j+1]){
							cmx(X[i][j+1],(*this)[i][k+3]+another[k+3][j+1]);
						}
					}
				}
            }
        }
        return X;
    }
    mat operator-(){
        mat<T> X(this->r,this->c);
        rep(i,this->r){
            rep(j,this->c){
                X[i][j] = -(*this)[i][j];
            }
        }
        return X;
    }
    void print(){
        rep(i,this->r){
            rep(j,(this->c)-1){
                cout << (*this)[i][j] << ",";
            }
            cout << (*this)[i][(this->c)-1] << endl;
        }
    }
};

template<typename T> mat<T> pow(mat<T> A,ll cnt)
{
    if(A.row() != A.column()){
        cout << "累乗不可" << endl;
    }
	mat<T> B = A;
	--cnt;
	while(cnt>0){
		if(cnt & 1){
			B = B*A;
		}
		A = A*A;
		cnt >>= 1;
	}
	return B;
}

struct edge{
	int to,cost;
};

vector<edge> G[MAX_N];

bool possible(mat<int>& A,const int cri,const int K)
{
	int n = A.row();
	mat<int> res = pow(A,cri);
	int mx = 0;
	rep(i,n){
		rep(j,n){
			cmx(mx,res[i][j]);
		}
	}
	return (mx >= K);
}

int mx[101][151];
int pre[101][151];

int main()
{
	cin.tie(0);
	ios::sync_with_stdio(false);
	int n,m,K;
	cin >> n >> m >> K;
	n = (n+3)/4*4;
	mat<int> A(n,n);
	rep(i,m){
		int a,b,c;
		cin >> a >> b >> c;
		cmx(A[a][b],c);
	}
	rep(i,n){
		rep(j,n){
			if(A[i][j]){
				G[i].pb((edge){j,A[i][j]});
			}
		}
	}
	mat<int> res = pow(A,100);
	if(!possible(A,K,K)){
		cout << "-1\n";
		return 0;
	}
	int l = 0,r = K;
	while(r-l>1){
		int mid = (l+r)/2;
		if(possible(A,mid,K)){
			r = mid;
		}else{
			l = mid;
		}
	}
	cout << r << "\n";
	if(r > 100){
		return 0;
	}
	rep(i,r){
		rep(j,n){
			each(e,G[j]){
				if(mx[i+1][e.to] < mx[i][j] + e.cost){
					mx[i+1][e.to] = mx[i][j] + e.cost;
					pre[i+1][e.to] = j;
				}
			}
		}
	}
	int cri = *max_element(mx[r],mx[r]+n);
	vector<int> ans;
	rep(i,n){
		if(mx[r][i] == cri){
			int nw = i;
			rrep(j,r+1){
				ans.pb(nw);
				nw = pre[j][nw];
			}
			reverse(all(ans));
			each(it,ans){
				cout << it << " ";
			}
			cout << "\n";
			break;
		}
	}
	return 0;
}


Measured memory_bytes: 3592