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#include <fstream>
#include <iostream>
#include <vector>
#include <queue>
#define INF 0x3F3F3F3F
using namespace std;
ifstream f("bellmanford.in");
ofstream g("bellmanford.out");
vector<pair<int, int> > graf[50005];
int n, m;
bool inQ[50005];
int cnt[50005], d[50005];
queue<int> Q;
void read()
{
f>>n>>m;
int x, y, c;
for(int i = 0; i<m; i++)
{
f>>x>>y>>c;
graf[x].push_back({y, c});
}
}
void init()
{
for(int i = 2; i<=n; i++)
{
d[i] = INF;
}
}
int bellman()
{
Q.push(1);
cnt[1] = 1;
while(!Q.empty())
{
int node = Q.front();
cout<<node<<" ";
inQ[node] = false;
Q.pop();
for(auto &p : graf[node])
{
if(d[node] + p.second < d[p.first])
{
d[p.first] = d[node] + p.second;
if(!inQ[p.first])
{
Q.push(p.first);
cnt[p.first]++;
if(cnt[p.first] >= n)
{
return 1;
}
inQ[p.first] = true;
}
}
}
}
return 0;
}
int main()
{
read();
init();
if(!bellman())
{
for(int i = 2; i<=n; i++)
{
g<<d[i]<<" ";
}
}
else
{
g<<"Ciclu negativ!";
}
return 0;
}