# LA 3288

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## 3288 - Harmonic Mean[edit]

## Summary[edit]

Given of a sequence of several integers, compute their harmonic mean and print it in the form of a reduced fraction.

## Explanation[edit]

This is the easiest problem of this contest. It was just required to write a program, doing the calculation described in the problem statement.

## Notes[edit]

- The output values may not fit in standard 32-bit integer type. The problem statement states that both the numerator and the denominator of the final answer fit into a 64-bit signed integer type. Thus, it is possible to use 64-bit integers throughout the computation – but be careful to check that your intermediate computations don't overflow.

## Input[edit]

5 4 1 2 3 4 8 1 1 1 1 1 1 1 1 8 100 100 100 100 100 100 100 100 8 99 99 98 97 93 94 92 91 7 100 100 99 1 72 86 7

## Output[edit]

Case 1: 48/25 Case 2: 1/1 Case 3: 100/1 Case 4: 6559696215072/68848064387 Case 5: 41718600/7142671