For example, chance is 100% for minimum 0 heads when a coin is tossed 7 times.
Chance is 50% for minimum 2 heads when a coin is tossed 3 times.
Chance is 0% for minimum 12 heads when a coin is tossed 11 times.
this problem could use some nontrivial testcases
Figurate number triangle
Back to basics 2 - Function Path
Getting the indices from a vector
Generate a string like abbcccddddeeeee
Mr. Pyramidad & Ms. Whissy Bolower
Dick Van Dyck?
Acidity of vinegar and salts
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