#include <bits/stdc++.h>
using namespace std;

#define forr(i, a, b) for(ll i = (ll) a; i < (ll) b; i++)
#define forn(i, n) forr(i, 0, n)
#define dforr(i,a,b) for(int i=int(b)-1;i>=int(a);--i)
#define dforn(i,n) for(int i = n-1; i>=0; i--)
#define pb push_back
#define fst first
#define snd second
#define ln '\n'
#define sz(c) ((int)c.size())
#define zero(v) memset(v, 0, sizeof(v))
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<ll> vll;
const ll MOD = 1e9 + 7;
const ll MAXN = 1009;
const ll INF = 9e18;
const ld EPS = 1e-9;

vi g[MAXN];
pair<double,double> pos[MAXN];
int vis[MAXN];

void dfs(int u, int signo) {
    vis[u] = 1;
    int cant = 0;
    for(auto v : g[u]) if (!vis[v]) cant++;
    double paso = 2.0/(cant+0.0);
    if (signo == -1) paso = paso*(-1.0);
    double dx = -1.0 * (signo+0.0);
    int pari = 0; 
    for(auto v : g[u]) {
        if (!vis[v]) {
            double nX = pos[u].fst+dx;
            int dire = (nX > pos[u].fst ? -1 : 1);
            double nY = sqrt(1-(dx*dx))+pos[u].snd;
            pos[v] = {nX,nY};
            dfs(v,dire);
            dx = dx + paso;
            //if (pari%2 == 0) dx = dx - paso, pari++;
            //else dx = dx * (-1.0), pari++;

        }
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    //freopen("input.txt","r",stdin);
    int n;
    cin >> n;
    forn(_,n-1) {
        int u,v;
        cin >> u >> v;
        u--; v--;
        g[u].pb(v);
        g[v].pb(u);
    }
    pos[0] = {0.0,0.0};
    dfs(0,1);
    forn(i,n) cout << setprecision(8) << fixed << pos[i].fst << " " << pos[i].snd << ln;
}