Problem 1096. Largest Twin Primes

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Solution 173238

Submitted on 5 Dec 2012 by Tim

Size: 26
Leading solution size is 8.

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2 Comments

2 Comments

Ryan on 5 Dec 2012

Tim,
Can you explain what the +'01'-'0' is doing? I don't see how i+'01'-'0'=[i,i+1].
Thanks

J.R.! Menzinger on 6 Dec 2012

'01 ' is a char vector of 2 positions: '0' ans '1'.
If you subtract '0' to it, it results a char vector with characters 0 and 1.
So '01'-'0' is the same as [0 1], but because of the '[]', it cost less operations.

Test Suite

Test	Status	Code Input and Output
1	Pass	%% x = 1001; y_correct = [881 883]; assert(isequal(your_fcn_name(x),y_correct))
2	Pass	%% x = 1964; y_correct = [1949 1951]; assert(isequal(your_fcn_name(x),y_correct))
3	Pass	%% x = 123456789; y_correct = [123456209 123456211]; assert(isequal(your_fcn_name(x),y_correct))

Test

Status

Code Input and Output

Pass

%% x = 1001; y_correct = [881 883]; assert(isequal(your_fcn_name(x),y_correct))

Pass

%% x = 1964; y_correct = [1949 1951]; assert(isequal(your_fcn_name(x),y_correct))

Pass

%% x = 123456789; y_correct = [123456209 123456211]; assert(isequal(your_fcn_name(x),y_correct))

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Problem 1096. Largest Twin Primes

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