// Slower C++ solution:
#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 svec(v) cout<<#v<<":";rep(kbrni,v.size())cout<<" "<<v[kbrni];cout<<endl

#define sset(s) cout<<#s<<":";each(kbrni,s)cout<<" "<<kbrni;cout<<endl

#define smap(m) cout<<#m<<":";each(kbrni,m)cout<<" {"<<kbrni.first<<":"<<kbrni.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<double> vd;

typedef vector<P> vp;

typedef vector<string> vs;



const int MAX_N = 100005;



template<typename T> class Heap {

public:

    struct node {

        node* l; node* r; T val;

        node(T t) : l(nullptr), r(nullptr), val(t){}

    };

    node* root;

    Heap() : root(nullptr){}

    node* meld(node* a, node* b){

        if(!a) return b; if(!b) return a;

        if(a->val > b->val) swap(a, b);

        a->r = meld(a->r,b); swap(a->l, a->r);

        return a;

    }

    void push(T val){ node* p = new node(val); root = meld(root, p); }

    T top(){ return root->val; }

    void pop(){ node* p = root; root = meld(root->r, root->l); delete p; }

};





struct edge{

    int to, cost;

};



int d[MAX_N];

vector<edge> G[MAX_N];



void dijkstra(int s)

{

    Heap<P> que;

    d[s] = 0;

    que.push(P(0,s));

    while(que.root){

        P p = que.top();

        que.pop();

        int v = p.second;

        if(d[v] < p.first) continue;

        for(auto w : G[v]){

            if(d[w.to] > d[v] + w.cost){

                d[w.to] = d[v] + w.cost;

                que.push(P(d[w.to],w.to));

            }

        }

    }

}



int main()

{

    int n,m,s;

    scanf("%d%d%d",&n,&m,&s);

    rep(i,m){

        int a,b,c;

        scanf("%d%d%d",&a,&b,&c);

        G[a].pb((edge){b,c});

    }

    fill(d,d+n,INF);

    dijkstra(s);

    rep(i,n){

        if(d[i] == INF){

            cout << "INF\n";

        }else{

            cout << d[i] << "\n";

        }

    }

    return 0;

}

// Faster C++ solution for the same problem (measured speedup: 3.5265319513305013x):
#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 sar(a,n) {cout<<#a<<":";rep(pachico,n)cout<<" "<<a[pachico];cout<<endl;}



using namespace std;



template<typename S,typename T>auto&operator<<(ostream&o,pair<S,T>p){return o<<"{"<<p.fi<<","<<p.se<<"}";}

template<typename T>auto&operator<<(ostream&o,set<T>s){for(auto&e:s)o<<e<<" ";return o;}

template<typename S,typename T,typename U>

auto&operator<<(ostream&o,priority_queue<S,T,U>q){while(!q.empty())o<<q.top()<<" ",q.pop();return o;}

template<typename K,typename T>auto&operator<<(ostream&o,map<K,T>&m){for(auto&e:m)o<<e<<" ";return o;}

template<typename T>auto&operator<<(ostream&o,vector<T>v){for(auto&e:v)o<<e<<" ";return o;}

void ashow(){cout<<endl;}template<typename T,typename...A>void ashow(T t,A...a){cout<<t<<" ";ashow(a...);}

template<typename S,typename T,typename U>

struct TRI{S fi;T se;U th;TRI(){}TRI(S f,T s,U t):fi(f),se(s),th(t){}

bool operator<(const TRI&_)const{return(fi==_.fi)?((se==_.se)?(th<_.th):(se<_.se)):(fi<_.fi);}};

template<typename S,typename T,typename U>

auto&operator<<(ostream&o,TRI<S,T,U>&t){return o<<"{"<<t.fi<<","<<t.se<<","<<t.th<<"}";}



typedef pair<int, int> P;

typedef pair<ll, ll> pll;

typedef TRI<int, int, int> tri;

typedef vector<int> vi;

typedef vector<ll> vl;

typedef vector<vi> vvi;

typedef vector<vl> vvl;

typedef vector<P> vp;

typedef vector<double> vd;

typedef vector<string> vs;



const int MAX_N = 100005;



class List {

public:

    struct node {

        int prev, next;

    };

    const int N, H;

    vector<node> dat;

    List(const int _N, const int _H) : N(_N), H(_H), dat(N+H){ clear(); }

    inline bool empty(const int h) const { return (dat[N+h].prev == N+h); }

    inline int back(const int h) const { return dat[N+h].prev; }

    inline void insert(const int h, const int u){

        dat[u].prev = dat[N+h].prev, dat[u].next = N+h;

        dat[dat[N+h].prev].next = u, dat[N+h].prev = u;

    }

    inline void erase(const int u){

        dat[dat[u].prev].next = dat[u].next, dat[dat[u].next].prev = dat[u].prev;

    }

    inline void clear(const int h){ dat[N+h].prev = dat[N+h].next = N+h; }

    inline void clear(){

        for(int i = N; i < N+H; ++i) dat[i].prev = dat[i].next = i;

    }

};



class RadixHeap{

public:

    const int V;

    int size, last;

    List bucket;

    #define impl(x) (x == last) ? 0 : 32 - __builtin_clz(x ^ last)



    RadixHeap(const int node_size) : V(node_size), size(0), last(0), bucket(V, 32){}

    inline bool empty(){ return (size == 0); }

    inline void decrease_key(int newd, int ver){

        bucket.erase(ver), bucket.insert(impl(newd), ver);

    }

    inline void push(int dist, int ver){

        ++size, bucket.insert(impl(dist), ver);

    }

    inline pair<int, int> pop(const vector<int>& dist){

        pair<int, int> res = {numeric_limits<int>::max(), -1};

        if(bucket.empty(0)){

            int id = 0;

            while(bucket.empty(++id));

            for(int i = bucket.dat[V+id].next; i < V; i = bucket.dat[i].next){

                if(dist[i] < res.first) res = {dist[i], i};

            }

            last = res.first, bucket.erase(res.second);

            for(int i = bucket.dat[V+id].next, j = bucket.dat[i].next; i < V;){

                bucket.insert(impl(dist[i]), i), j = bucket.dat[i = j].next;

            }

            bucket.clear(id);

        }else{

            res = {last, bucket.back(0)}, bucket.erase(res.second);

        }

        return --size, res;

    }

};



class Dijkstra {

public:

    struct edge{

        int to, cost;

    };

    const int V, inf;

    vector<vector<edge> > G;

    vector<int> d;

    Dijkstra(const int node_size)

     : V(node_size), inf(numeric_limits<int>::max()), G(V), d(V, inf){}

    void add_edge(const int u, const int v, const int cost){

        G[u].push_back((edge){v, cost});

    }

    void solve(const int s){

        RadixHeap que(V);

        d[s] = 0;

        que.push(0, s);

        while(!que.empty()){

            pair<int, int> p = que.pop(d);

            const int v = p.second;

            for(auto& e : G[v]){

                if(d[e.to] == inf){

                    d[e.to] = d[v] + e.cost;

                    que.push(d[e.to], e.to);

                }else if(d[e.to] > d[v] + e.cost){

                    d[e.to] = d[v] + e.cost;

                    que.decrease_key(d[e.to], e.to);

                }

            }

        }

    }

};



int in() {

    int n, c;

    while ((c = getchar()) < '0') if (c == EOF) return -1;

    n = c - '0';

    while ((c = getchar()) >= '0') n = n * 10 + c - '0';

    return n;

}



void out(int n) {

    int res[11], i = 0;

    do { res[i++] = n % 10, n /= 10; } while (n);

    while (i) putchar(res[--i] + '0');

    putchar('\n');

}



int main()

{

    int n = in(), m = in(), s = in();

    Dijkstra dj(n);

    rep(i,m){

        int a = in(), b = in(), c = in();

        dj.add_edge(a,b,c);

    }

    dj.solve(s);

    rep(i,n){

        if(dj.d[i] == numeric_limits<int>::max()){

            putchar('I'), putchar('N'), putchar('F'), putchar('\n');

        }else{

            out(dj.d[i]);

        }

    }

    return 0;

}