The Snow Maiden (Russian: Снегу́рочка ; tr.
:"Snegurochka") is a 1952 Soviet/Russian traditionally animated feature film.
 It was produced at the Soyuzmultfilm studio in Moscow and is based on the Slavic-pagan play of the same name by Aleksandr Ostrovsky (itself largely based on traditional folk tales).
 Music from Nikolai Rimsky-Korsakov's opera "The Snow Maiden" is used, arranged for the film by L. Shvarts.
 The animated film was shown at movie theater.
Sadko (Russian: Садко , the name of the main character) is an opera in seven scenes by Nikolai Rimsky-Korsakov.
 The libretto was written by the composer, with assistance from Vladimir Belsky, Vladimir Stasov, and others.
 Rimsky-Korsakov was first inspired by the Bylina of Sadko in 1867, when he completed a tone poem on the subject, his Op. 5.
 After finishing his second revision of this work in 1891, he decided to turn it into a dramatic work.
Snegurochka or Snow Maiden, is a character in Russian fairy tales.
The Snow Maiden (subtitle: A Spring Fairy Tale) (Russian: Снегурочка–Весенняя сказка , "Snegúrochka–Vesennyaya Skazka") is an opera in four acts with a prologue by Nikolai Rimsky-Korsakov, composed during 1880–1881.
 The Russian libretto, by the composer, is based on the like-named play by Alexander Ostrovsky (which had premiered in 1873 with incidental music by Tchaikovsky).
The Daughter of the Snows (also known as "Snegurochka" or "La Fille des neiges") is a fantastic ballet in three acts and five scenes, with choreography by Marius Petipa and music by Ludwig Minkus.
 The libretto by Marius Petipa is based on the play "The Snow Maiden" by Alexander Ostrovsky, inspired by a Russian folk fairy tale about Snegurochka from the folklore collection by Alexander Afanasyev.
Valery Kritskov is a Russian conductor who used to take conducting lessons at the Moscow Institute of Culture which were taught by Kirill Tikhonov.
 He graduated from there in 1988 and then worked in Moscow-based Helikon Opera till he got employed with Novaya Opera in 2002.
 While there, he conducted many operas including Nikolai Rimsky-Korsakov's "The Snow Maiden" and "The Tsar’s Bride" as well as Anton Rubinstein's "The Demon" and Tchaikovsky's "The Maid of Orleans".
 He also conducted works by the Italian composers such as Pietro Mascagni's "Cavalleria rusticana" and Ruggero Leoncavallo's "Pagliacci" and German such as Richard Wagner's "Lohengrin" and Strauss' "Die Fledermaus" as well as a concert dedicated to Vincenzo Bellini.
 Besides operas, he is also known for his conducting of the Russian ballet based on works by Tchaikovsky and Sergei Prokofiev as well as German and Austrian ballet composers such as Ludwig Minkus and Charles Gounod.
 Later on, he became a conductor of the Coppélia ballet which was based by Léo Delibes work and was produced by Imperial Russian Ballet.
 Currently he has two CD recordings called "Chorus of the Novaya Opera Theatre of Moscow" and the "Soloists of the Novaya Opera Theatre of Moscow".
Sergey Vasilyevich Aydarov (Russian: Сергей Васильевич Айдаров , born Vishnevsky, Вишневский, 20 October 1867, Moscow, Imperial Russia, — 16 August 1938, Moscow, USSR) was a Russian and Soviet stage actor and theatre director, associated with the Moscow's Maly Theatre where he debuted in 1898.
 His most acclaimed parts were those in the plays by Alexander Ostrovsky (Krutitsky in "Enough Stupidity in Every Wise Man", Vyshnevsky in "A Profitable Position", Berendey in "The Snow Maiden", Ivan Grozny in "Vasilisa Melentyeva", Dulebov in "Talents and Admirers"), as well in "Julius Caesar" and "The Tempest" by William Shakespeare.
The Snow Maiden: A Spring Fairy Tale is an opera in four acts with a prologue by Nikolai Rimsky-Korsakov, composed during 1880–1881.
Snegurochka (diminutive) or Snegurka (Russian: Снегу́рочка, Снегу́рка ; ] ), or The Snow Maiden, is a character in Russian fairy tales.
Soleil de Nuit (Midnight Sun), was a 1915 ballet by Léonide Massine at the Ballets Russes to Rimsky-Korsakov's music from "The Snow Maiden", with sets and costumes by Mikhail Larionov.

Question: Which had more acts/ scenes, The Snow Maiden or Sadko?
Answer: Sadko