55.cpp

#define _USE_MATH_DEFINES
#include <stdio.h>
#include <math.h>


struct Circle {
    int xc, yc, r;

    Circle(int xc = 0, int yc = 0, int r = 0) : xc(xc), yc(yc), r(r) { }

    inline bool include (double x, double y) {
        return (x-xc)*(x-xc) + (y-yc)*(y-yc) <= r*r;
    }
} A, B;

int main() {
    freopen("input.txt", "rt", stdin);
    freopen("output.txt", "wt", stdout);

    int r, s;

    scanf("%d %d %d %d %d %d", &A.xc, &A.yc, &B.xc, &B.yc, &r, &s);
    A.r = B.r = r;

    double same_square = 0, dx = r / 1000.0, dy = r / 1000.0;
    for (double x = A.xc - r + dx/2; x < A.xc + r; x += dx)
        for (double y = A.yc - r + dy/2; y < A.yc + r; y += dy)
            if (A.include(x, y) && B.include(x, y))
                same_square += dx*dy;

    printf((2*M_PI*r*r-same_square > s) ? "YES" : "NO");


    return 0;
}