Cody

# Problem 3095. Return fibonacci sequence do not use loop and condition version 2

Solution 2895818

Submitted on 31 Aug 2020
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### Test Suite

Test Status Code Input and Output
1   Pass
% !/bin/cp fib.m safe % !/bin/rm *.* % !/bin/mv safe fib.m % Clean user's function from some known jailbreaking mechanisms functions={'!','feval','eval','str2func','str2num','regex','system','dos','unix','perl','assert','fopen','write','save','setenv','path','please','for','if','while','switch','round','roundn','fix','ceil','char','floor','\.','^','power'}; fid = fopen('fib.m'); st = char(fread(fid)'); for n = 1:numel(functions) st = regexprep(st, functions{n}, 'error(''No fancy functions!''); %','ignorecase'); end st = regexprep(st, 'function', 'error(''No fancy functions!''); %','ignorecase',2); fclose(fid); fid = fopen('fib.m' , 'w'); fwrite(fid,st); fclose(fid);

2   Fail
n = 1:5; f = [1 1 2 3 5]; assert(isequal(fib(n),f))

[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint2 (line 3) In solutionTest (line 5)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint2 (line 3) In solutionTest (line 5)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint2 (line 3) In solutionTest (line 5)] -0.0000 + 0.0000i 1.0000 - 0.0000i 2.0000 + 0.0000i 3.0000 + 0.0000i 8.0000 + 0.0000i 13.0000 + 0.0000i 1.0000 - 0.0000i 1.0000 + 0.0000i 3.0000 + 0.0000i 5.0000 + 0.0000i 13.0000 + 0.0000i 21.0000 + 0.0000i

Assertion failed.

3   Fail
n = 7 : 10; f = [13 21 34 55]; assert(isequal(fib(n),f))

[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint3 (line 3) In solutionTest (line 7)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint3 (line 3) In solutionTest (line 7)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint3 (line 3) In solutionTest (line 7)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint3 (line 3) In solutionTest (line 7)] -0.0000 + 0.0000i 1.0000 - 0.0000i 2.0000 + 0.0000i 3.0000 + 0.0000i 8.0000 + 0.0000i 13.0000 + 0.0000i 34.0000 - 0.0000i 55.0000 - 0.0000i 1.0000 - 0.0000i 1.0000 + 0.0000i 3.0000 + 0.0000i 5.0000 + 0.0000i 13.0000 + 0.0000i 21.0000 + 0.0000i 55.0000 - 0.0000i 89.0000 - 0.0000i

Assertion failed.

4   Fail
n = 20 : 22; f = [ 6765 10946 17711]; assert(isequal(fib(n),f))

[Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint4 (line 3) In solutionTest (line 9)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint4 (line 3) In solutionTest (line 9)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint4 (line 3) In solutionTest (line 9)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint4 (line 3) In solutionTest (line 9)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint4 (line 3) In solutionTest (line 9)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint4 (line 3) In solutionTest (line 9)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint4 (line 3) In solutionTest (line 9)] [Warning: Principal matrix logarithm is not defined for A with nonpositive real eigenvalues. A non-principal matrix logarithm is returned.] [> In logm (line 50) In fib>@(x)expm((x-1)*logm(g)) (line 3) In fib (line 3) In ScoringEngineTestPoint4 (line 3) In solutionTest (line 9)] 1.0e+04 * Columns 1 through 9 -0.0000 + 0.0000i 0.0001 - 0.0000i 0.0002 + 0.0000i 0.0003 + 0.0000i 0.0008 + 0.0000i 0.0013 + 0.0000i 0.0034 - 0.0000i 0.0055 - 0.0000i 0.0144 + 0.0000i 0.0001 - 0.0000i 0.0001 + 0.0000i 0.0003 + 0.0000i 0.0005 + 0.0000i 0.0013 + 0.0000i 0.0021 + 0.0000i 0.0055 - 0.0000i 0.0089 - 0.0000i 0.0233 + 0.0000i Columns 10 through 16 0.0233 + 0.0000i 0.0610 + 0.0000i 0.0987 + 0.0000i 0.2584 - 0.0000i 0.4181 - 0.0000i 1.0946 + 0.0000i 1.7711 + 0.0000i 0.0377 + 0.0000i 0.0987 + 0.0000i 0.1597 + 0.0000i 0.4181 - 0.0000i 0.6765 - 0.0000i 1.7711 + 0.0000i 2.8657 + 0.0000i

Assertion failed.

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