#include <vector>
#include <iostream>
#include <algorithm>
#include <array>
#include <math.h>
#include <numeric>
#include <random>
using namespace std;
random_device rd;
mt19937 rng(rd());
const double MXD = 25.4*2 + 160 + 0.00001;
double sq(double x) {
    return x*x;
}
int main() {
    
    int n; cin >> n;
    vector<array<int,3>> cs(n);
    for(auto& [x,y,r] : cs) {
        cin >> x >> y >> r;
    }
    int MX = n*sqrt(n);
    auto near = [&](int i, int j) {
        auto [x,y,r] = cs[i];
        auto [x2,y2,r2] = cs[j];
        return (sq(x-x2) + sq(y-y2) ) < sq(25.4*2 + (r+r2)/2.);
    };
    
    while(true) {
        vector<int> ord(n);
        iota(ord.begin(),ord.end(),0);
        vector<double> in(n);
        double ang = uniform_real_distribution(0.,2*acos(-1))(rng);
        double sx = cos(ang),sy = sin(ang);
        for(int i=0;i<n;++i) in[i] = sx*cs[i][0]+sy*cs[i][1];
        sort(ord.begin(),ord.end(),[&](int i, int j) {return in[i]<in[j];});
        long long num=0;
        for(auto it = ord.begin(),kt=ord.begin();it!=ord.end();++it) {

            num+=kt-it;
        }
        if(num>MX) {
            MX*=2;
            continue;
        }
        vector<int> deg(n);
        vector<int> par(n);
        iota(begin(par),end(par),0);
        auto find = [&](int at) {
            while(at!=par[at]) {
                par[at] = par[par[at]];
                at=par[at];
            }
            return par[at];
        };
        auto addE = [&](int u, int v) {
            deg[u]++;
            deg[v]++;
            par[find(u)]=find(v);
        };
        for(auto it = ord.begin();it!=ord.end();++it) {
            auto kt = next(it);
            while(kt!=ord.end() and in[*kt]-in[*it]<=MXD) {
                if(near(*it,*kt)) addE(*it,*kt);
                ++kt;
            }
        }
        bool good=1;
        if(n>=7) {
            if(*min_element(begin(deg),end(deg))<2) {
                good=0;
            }
        }
        for(int i=1;i<n;++i) if(find(0)!=find(i)) {
            good=0;
        }
        if(good) cout << "yes\n";
        else cout << "no\n";

        break;

    }
}