#include <bits/stdc++.h>

using namespace std;
void fast_io() {
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
}

int main() {
    fast_io();
    long long x1, y1, x2, y2, x3;
    cin >> x1 >> y1 >> x2 >> y2 >> x3;
    if (abs(x1 * y2 - x2 * y1) == abs((x1 - x3) * y2 - (x2 - x3) * y1)) {
        cout << "Yes\n";
    } else {
        cout << "No\n";
    }
}