55.cpp

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

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;

    int nsteps = 10000;

    double dx = 2*r, dy = 2*r;
    dx /= nsteps;
    dy /= nsteps;

    std::vector<double> x(nsteps), y(nsteps);

    x[0] = A.xc - r + dx / 2;
    y[0] = A.yc - r + dy / 2;

    for (int i = 1; i < nsteps; ++i) {
        x[i] = x[i-1] + dx;
        y[i] = y[i-1] + dy;
    }

    int count = 0;
    for (auto & it_x : x)
        for (auto & it_y : y)
            if (A.include(it_x, it_y) && B.include(it_x, it_y))
                ++count;

    double same_square = 4.0 * count / nsteps / nsteps * r * r;

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

    return 0;
}