#include <bits/stdc++.h>

using namespace std;

long long vmul(long long x1, long long y1, long long x2, long long y2) {
    return x1 * y2 - x2 * y1;
}

long long smul(long long x1, long long y1, long long x2, long long y2) {
    return x1 * x2 + y1 * y2;
}


long long x[42], y[42];


int main() {
    long long x1, y1, x2, y2;
    cin >> x1 >> y1 >> x2 >> y2;
    x2 -= x1;
    y2 -= y1;
    if (x2 == 0 && y2 == 0) {
        puts("YES");
        return 0;
    }
    int n;
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> x[i] >> y[i];
    }
    for (int i = 0; i < n; i++) {
        if (vmul(x[i], y[i], x2, y2) == 0 && smul(x[i], y[i], x2, y2) > 0) {
            puts("YES");
            return 0;
        }
        for (int j = 0; j < n; j++) {
            if (vmul(x[i], y[i], x[j], y[j]) > 0 && vmul(x[i], y[i], x2, y2) > 0 && vmul(x2, y2, x[j], y[j]) > 0) {
                puts("YES");
                return 0;
            }
        }
    }
    puts("NO");
}