20.4 Write a method to count the number of 2s between 0 and n.
// What this mean? // Given a n. // for (int i = 0 -> n) // { // result += numOf2In(i); // } // This is purely a math problem.
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20.4 Write a method to count the number of 2s between 0 and n.
// What this mean? // Given a n. // for (int i = 0 -> n) // { // result += numOf2In(i); // } // This is purely a math problem.
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