hdu 4798 Skycity(几何)
题目链接:hdu 4798 Skycity
代码
#include
#include
#include
#include using namespace std;
const double pi = 4 * atan(1.0);int F;
double R, L, H, S;double solve (double r, double h) {int n = pi / atan(S/2/h/r);double rad = pi / n;return 2 * r * n * tan(pi / n);
}int main () {while (scanf("%lf%lf%lf%d%lf", &R, &L, &H, &F, &S) == 5) {double ans = 0, r = (R - L) / F, h = H / F;for (int i = 0; i < F; i++)ans += solve(L + r * i, h) * h;printf("%.3lf\n", ans);}return 0;
}
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