a, c, d, g, h, i, j, k, m, p, q, r, aa, t, u, x;
double *f, *s;
double l, n, o, v, w;
b() {
  double e, ad, ae, af, ag, ah, ai, aj, am, an, ap, aq, ar, as, at, av, aw;
  for (; q; q = aa) {
    r = f[x];
    ah = f[r + 2] - g;
    af = f[0] - f[r];
    ag = 1 - f[r + 1];
    av = ae * af * ah * ai;
    aj = h - w * p * ah;
    am = o + av * af;
    an = j * o * av * ag;
    ap = (am - m) * ad * (k - an - n) * a - v * c;
    ar = (aj - l) * c;
    if (a)
      ;
    else
    az:
      switch (d) {
      case 1:
        e = aw * i;
        break;
      case 2:
        exit(1);
      }
    s[0] = ap;
    t += at * aq;
    u = as += at * ar;
    if (c)
      goto az;
  }
  return e;
}