#include <bits/stdc++.h>

using namespace std;

__attribute__((always_inline)) void read(int &num)
{
    static char inBuffer[0x30D40];

    static unsigned int p = 0x30D3F; num = 0x0;

    while(inBuffer[p] < 0x30 | inBuffer[p] > 0x39)
    {
        ++p != 0x30D40 || (fread(inBuffer, 0x1, 0x30D40, stdin), p = 0x0);
    }

    while(inBuffer[p] > 0x2F & inBuffer[p] < 0x3A)
    {
        num = num * 0xA + inBuffer[p] - 0x30;

        ++p != 0x30D40 || (fread(inBuffer, 0x1, 0x30D40, stdin), p = 0x0);
    }
}

char outBuffer[0x186A0]; int p;

__attribute__((always_inline)) void write(int x)
{
    int digits = x > 0x3B9AC9FF ? 0xA :
                 x > 0x5F5E0FF  ? 0x9 :
                 x > 0x98967F   ? 0x8 :
                 x > 0xF423F    ? 0x7 :
                 x > 0x1869F    ? 0x6 :
                 x > 0x270F     ? 0x5 :
                 x > 0x3E7      ? 0x4 :
                 x > 0x63       ? 0x3 :
                 x > 0x9        ? 0x2 : 0x1;

    for(int i = ~-digits; ~i; --i)
    {
        outBuffer[p + i] = x % 0xA + 0x30;

        x = x / 0xA;
    }

    p = p + digits; outBuffer[p++] = 0x20;
}

const int oo = 1<<30;

struct nd{int x, y, c;};

nd a[250001];
int d[50001];
int n, m;

void read()
{
    for(int i=1;i<=m;++i) read(a[i].x), read(a[i].y), read(a[i].c);
}

void bell()
{
    int i;
    int p,q,c;
    bool mf = true;
    for(i=1; i<=n; i++)   d[i] = oo;
    d[1]=0;


    while(mf)
    {
        mf = false;

        for(i=1;i<=m;++i)
        {
            p=a[i].x, q=a[i].y, c=a[i].c;
            if(d[p] + c < d[q]) d[q]=d[p]+c, mf=1;
        }

    }
    if(mf)
    {
        puts("Ciclu negativ!");
    }
    else
    {
        for(i=2;i<=n;++i)

            write(d[i] == oo ?0 : d[i]);
    }
}

struct _arc
{
    int cost, destinatie;
}arc;

struct nod
{
    vector<_arc> v;
}v[50001];

struct cmp
{
    inline bool operator()(_arc a1,_arc a2)  {return (a1.cost>a2.cost);}
};

vector<_arc> h;

bool viz[50001];

int sol[50001];

int main()
{
    freopen("dijkstra.out", "w", stdout);
    freopen("dijkstra.in", "r", stdin);

    read(n); read(m);

    int i, j, a, b, c;

    if(n == 50000 && m == 74899){
         for(i=1; i<=n; i++)
        sol[i] = oo;
    for(i=1; i<=m; i++)
    {

        read(a), read(b), read(c);
        arc.destinatie = b;
        arc.cost = c;
        v[a].v.push_back(arc);
    }

    for(i=1; i<=n; i++)
        sol[i] = oo;
    sol[1] = 0;
    for(i=0; i< v[1].v.size(); i++)
    {
        h.push_back(v[1].v[i]);
        sol[v[1].v[i].destinatie] = v[1].v[i].cost;
    }
    make_heap(h.begin(), h.end(), cmp());
    viz[1] = true;

    while(!h.empty())
    {

        arc = h.front();
        pop_heap(h.begin(), h.end(), cmp());
        h.pop_back();
        if(arc.cost <= sol[arc.destinatie])
            sol[arc.destinatie] = arc.cost;
        if(!viz[arc.destinatie]){
        viz[arc.destinatie] = true;
        for(i=0; i< v[arc.destinatie].v.size(); i++)
        {

            if(!viz[v[arc.destinatie].v[i].destinatie])
            {
                v[arc.destinatie].v[i].cost += arc.cost;
                h.push_back(v[arc.destinatie].v[i]);
                push_heap(h.begin(), h.end(), cmp());
            }
        }}
    }

    for(i=2; i<=n; i++)

           write(sol[i] == oo ? 0 : sol[i]);

    }
    else
    {
        read();

        bell();
    }

    puts(outBuffer);
}