初中几何题，延长梯形斜边相交于一点，2 次三角形相似 + 勾股定理

注意除法和整型-浮点型相互转换

#include <bits/stdc++.h>
using namespace std;

#define DBG(x) cout << #x << "=" << x << endl

void solve() {
  double ans = 0.0;
  int r, a, b, h;

  cin >> r >> a >> b >> h;

  if (b >= 2 * r) {
    printf("Drop\n");
  } else {
    double t = (1.0 * b * h) / (a - b);
    double b1 = (1.0 * b) / 2;
    double v1 = pow(t, 2) + pow(b1, 2);
    ans = (1.0 * r * sqrt(v1)) / b1 - t;
    printf("Stuck\n%.10f\n", ans);
  }
}

int main() {
  solve();

  return 0;
}