#include <iostream>
#include <vector>
#include <iomanip>
#include <algorithm>
#include <map>
#include <cmath>
#include <bitset>
#include <string>
#include <queue>
#include <stack>
#include <set>
#include <tuple>
#include <atcoder/all>
#include <sstream> // std::stringstream
#include <regex>
#include <fstream>
using namespace atcoder;
using mint = modint998244353;
//using mint = modint1000000007;
using namespace std;
using ll = long long;
static const double pi = 3.141592653589793;
const int INF = (1 << 29);
const ll mod = 998244353;
// ifstream ifs("");
template<class T> void print(T& a){cout<<a<<'\n';}

int main(){
    
    int x1,y1,x2,y2,x3;
    cin >> x1 >> y1 >> x2 >> y2 >> x3;

    if(abs(y1)==abs(y2)) cout << "Yes" << endl;
    else cout << "No" << endl;

}