Problem 2396. last n digit of a power function

Solution 464773

Submitted on 1 Jul 2014 by Clemens Giegerich

Size: 36
Leading solution size is 34.

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4 Comments

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Guillaume on 1 Jul 2014

Admittedly, I know very little about Java but I'm suprised this work since I can't find a constructor that takes a double. Only strings, byte patterns or random number generators. Care to explain?

Clemens Giegerich on 2 Jul 2014

There are a constructors for int and double: http://docs.oracle.com/javase/1.5.0/docs/api/java/math/BigDecimal.html#BigDecimal(int)
http://docs.oracle.com/javase/1.5.0/docs/api/java/math/BigDecimal.html#BigDecimal(double)

Guillaume on 2 Jul 2014

Oh yes, I missed that you were using BigDecimal instead of BigInteger.

Omer on 2 Jul 2014

i have a 25 sized solution but it doesnt accept since i used symbolic toolbox :)

Test Suite

Test	Status	Code Input and Output
1	Pass	%% base = 3; expo = 8; n = 2; y_correct = 61; assert(isequal(lastndigit(base,expo,n),y_correct))
2	Pass	%% base = 7; expo = 12; n = 5; y_correct = 87201; assert(isequal(lastndigit(base,expo,n),y_correct))
3	Pass	%% base = 25; expo = 71; n = 15; y_correct = 896881103515625; assert(isequal(lastndigit(base,expo,n),y_correct))
4	Pass	%% base = 768; expo = 1579; n = 22; y_correct = 3750595090000885317632; assert(isequal(lastndigit(base,expo,n),y_correct))

Problem 2396. last n digit of a power function

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Problem 2396. last n digit of a power function

Test Suite

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