#pragma GCC optimize("Ofast")
#include <iostream>
#include <vector>
#include <array>
#include <utility>
#include <algorithm>
using namespace std;
int sq(int x) {
    return x*x;
}
int main() {
    int n; cin >> n;
    vector<array<int,3>> a(n);
    for(auto& [x,y,r] : a){ 
        cin >> x >> y >> r;
    }
    vector<int> par(n);
    for(int i=0;i<n;++i) par[i]=i;
    auto find = [&](int at) {
        int to=at;
        while(par[to]!=to) to=par[to];
        while(at!=to) {
            int tmp = par[at];
            par[at]=to;
            at=tmp;
        }
        return to;
    };
    int comps=n;
    vector<int> deg(n);
    for(int i=0;i<n;++i) {
        auto [x,y,r] = a[i];
        for(int j=i+1;j<n;++j) {
            auto [ox,oy,oor] = a[j];
            if(abs(x-ox)+abs(y-oy)<=1000) { // simple check to reduce heavy operations.
                auto D = sq(x-ox)+sq(y-oy);
                if(D*100<=sq(10/2*(r+oor) +2*254)) {
                    deg[i]++;
                    deg[j]++;
                    // happens few times as graph is really sparse
                    int a = find(i), b = find(j);
                    if(a!=b) {
                        par[a]=b;
                        comps--;
                    }
                }
            }
        }
    }

    if(comps!=1 or (n>=7 and *min_element(begin(deg),end(deg))<2)) {
        cout << "no\n";
    } else cout << "yes\n";

}