Problem 2736. Pernicious Anniversary Problem

Solution 1324836

Submitted on 2 Nov 2017

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1 Comment

1 Comment

Gaston Levannier on 2 Nov 2017

With my function and R2015B, it works so I don't understand:
function y = isPernicious(x)
%UNTITLED2 Summary of this function goes here
% Detailed explanation goes here
if(x == 1)
y = true;
else
if(mod(x,2) == 0)
y = false;
else
y = true; % PRIME
for k=3:2:x-2
if(mod(x,k) == 0)
y = false; % NOT PRIME
break;
end
end
end
end
end

Test Suite

Test	Status	Code Input and Output
1	Pass	x = 5; y_correct = true; assert(isequal(isPernicious(x),y_correct))
2	Fail	x = 1; y_correct = false; assert(isequal(isPernicious(x),y_correct)) Assertion failed.
3	Pass	x = 2^randi(16); y_correct = false; assert(isequal(isPernicious(x),y_correct))
4	Pass	x = 17; y_correct = true; assert(isequal(isPernicious(x),y_correct))
5	Fail	x = 18; y_correct = true; assert(isequal(isPernicious(x),y_correct)) Assertion failed.
6	Pass	x = 61; y_correct = true; assert(isequal(isPernicious(x),y_correct))
7	Fail	x = 6; y_correct = true; assert(isequal(isPernicious(x),y_correct)) Assertion failed.
8	Pass	x = 2115; y_correct = false; assert(isequal(isPernicious(x),y_correct))
9	Fail	x = 2114; y_correct = true; assert(isequal(isPernicious(x),y_correct)) Assertion failed.
10	Pass	x = 2017; y_correct = true; assert(isequal(isPernicious(x),y_correct))

Problem 2736. Pernicious Anniversary Problem

Test Suite

Suggested Problems

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Problem 2736. Pernicious Anniversary Problem

Test Suite

Suggested Problems

More from this Author47

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