Wrap adaptive simpson more friendly

codes/Math/AdaptiveSimpson.cpp

@@ -1,11 +1,14 @@
-llf simp(llf l, llf r) {
-  llf m = (l + r) / 2;
-  return (f(l) + f(r) + 4.0 * f(m)) * (r - l) / 6.0;
+llf integrate(auto &&f, llf L, llf R) {
+  auto simp = [&](llf l, llf r) {
+    llf m = (l + r) / 2;
+    return (f(l) + f(r) + 4.0 * f(m)) * (r - l) / 6.0;
+  };
+  auto F = [&](auto Y, llf l, llf r, llf v, llf eps) {
+    llf m = (l+r)/2, vl = simp(l, m), vr = simp(m, r);
+    if (abs(vl + vr - v) <= 15 * eps)
+      return vl + vr + (vl + vr - v) / 15.0;
+    return Y(Y, l, m, vl, eps / 2.0) +
+                  Y(Y, m, r, vr, eps / 2.0);
+  };
+  return F(F, L, R, simp(L, R), 1e-6);
 }
-llf F(llf L, llf R, llf v, llf eps) {
-  llf M = (L + R) / 2, vl = simp(L, M), vr = simp(M, R);
-  if (abs(vl + vr - v) <= 15 * eps)
-    return vl + vr + (vl + vr - v) / 15.0;
-  return F(L, M, vl, eps / 2.0) +
-         F(M, R, vr, eps / 2.0);
-} // call F(l, r, simp(l, r), 1e-6)

docs/Math.md

@@ -191,7 +191,7 @@ Passed [Red and Black Tree](https://codeforces.com/contest/375/submission/243194
 Simpson integration method.
 Unknown time complexity.
 ### Test Status
-Passed [Two Cylinders](https://codeforces.com/problemsets/acmsguru/submission/99999/227216042)
+Passed [Two Cylinders](https://codeforces.com/problemsets/acmsguru/submission/99999/244862663).
 
 ## Golden Ratio Search
 ### Description