TopCoder Statistics - Problem Statement

Problem Statement

Your task is to write a calculator that will convert between four different length units: inches (in), feet (ft), yards (yd), and miles (mi).

The conversions between these units:

1 ft = 12 in
1 yd = 3 ft
1 mi = 1760 yd

You are given an int amount and Strings fromUnit and toUnit. Compute and return the amount of toUnits that corresponds to amount fromUnits. (For example, if amount=41, fromUnit="mi", and toUnit="in", you are supposed to compute the number of inches in 41 miles.)
Note that the result will not necessarily be an integer.

Definition

Class:: LengthUnitCalculator
Method:: calc
Parameters:: int, String, String
Returns:: double
Method signature:: double calc(int amount, String fromUnit, String toUnit)
(be sure your method is public)

Notes

Pay attention to the unusual time limit.

Constraints

amount will be between 1 and 1,000, inclusive.
fromUnit will be one of {"in", "ft", "yd", "mi"}.
toUnit will be one of {"in", "ft", "yd", "mi"}.

Examples

1

"mi"

"ft"

Returns: 5280.0

We are asked to convert 1 mile into feet. From the information in the statement we know that 1 mi = 1760 yd = (1760 * 3) ft = 5280 ft.
1

"ft"

"mi"

Returns: 1.893939393939394E-4

Here we have 1 ft = 1/5280 mi, which is approximately 0.000189394 miles.
123

"ft"

"yd"

Returns: 41.0
1000

"mi"

"in"

Returns: 6.336E7
1

"in"

"mi"

Returns: 1.5782828282828283E-5
47

"mi"

"mi"

Returns: 47.0
997

"in"

"ft"

Returns: 83.08333333333333
997

"in"

"yd"

Returns: 27.694444444444443
997

"in"

"mi"

Returns: 0.015735479797979797
998

"ft"

"in"

Returns: 11976.0
348

"ft"

"yd"

Returns: 116.0
2

"ft"

"mi"

Returns: 3.787878787878788E-4
900

"yd"

"in"

Returns: 32400.0
324

"yd"

"ft"

Returns: 972.0
3

"yd"

"mi"

Returns: 0.0017045454545454545
324

"mi"

"in"

Returns: 2.052864E7
223

"mi"

"ft"

Returns: 1177440.0
32

"mi"

"yd"

Returns: 56320.0
5

"ft"

"yd"

Returns: 1.6666666666666667
1

"ft"

"ft"

Returns: 1.0
1

"in"

"yd"

Returns: 0.027777777777777776
47

"in"

"mi"

Returns: 7.417929292929293E-4
5

"in"

"ft"

Returns: 0.4166666666666667
13

"in"

"ft"

Returns: 1.0833333333333333
101

"in"

"mi"

Returns: 0.0015940656565656566
17

"yd"

"mi"

Returns: 0.009659090909090909
55

"ft"

"ft"

Returns: 55.0
50

"yd"

"in"

Returns: 1800.0
1

"ft"

"yd"

Returns: 0.3333333333333333
5

"mi"

"mi"

Returns: 5.0
3

"mi"

"yd"

Returns: 5280.0
1000

"in"

"yd"

Returns: 27.77777777777778
10

"in"

"in"

Returns: 10.0
15

"in"

"ft"

Returns: 1.25
100

"in"

"mi"

Returns: 0.0015782828282828283
1

"yd"

"ft"

Returns: 3.0
12

"mi"

"mi"

Returns: 12.0
999

"in"

"in"

Returns: 999.0
5

"yd"

"mi"

Returns: 0.002840909090909091
10

"in"

"ft"

Returns: 0.8333333333333334
10

"in"

"mi"

Returns: 1.5782828282828284E-4
15

"yd"

"ft"

Returns: 45.0

Statistics

Problem Statement for "LengthUnitCalculator"

Problem Statement

Definition

Notes

Constraints

Examples