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The beginning

Umbrella Corporation released the T-virus years ago. People got infected by it all around the world leading to chaos and a fight against the living dead a.k.a Zombies. Alice, the only person resistent to the T-virus has found out a secret key to the Umberlla Corp. system which holds the antidode to the virus. But the key is encoded within a larger string. She needs our help in finding out the key

HINT LADDERno hints yet
L1 Observation
L2 Technique
L3 Approach
L4 Pseudo-code
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L5 Full solution
L5 unlocks only if you insist twice
solution.cppC++17

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