Isqrt (integer square root) of X: Difference between revisions
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Not a robot (talk | contribs) (→{{header|MAD}}: Change this to use the quadratic residue method) |
Not a robot (talk | contribs) (→{{header|APL}}: Change this to use the quadratic residue method) |
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=={{header|APL}}== |
=={{header|APL}}== |
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{{Incorrect|APL| <br><br> The method used by this APL program is '''not''' the method that this task requires, namely: <br><br> quadratic residue. <br><br>}} |
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Works in [[Dyalog APL]] |
Works in [[Dyalog APL]] |
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<lang APL> |
<lang APL> i←{x←⍵ |
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q←(×∘4)⍣{⍺>x}⊢1 |
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⊃{ r z q←⍵ |
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q←⌊q÷4 |
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t←(z-r)-q |
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r←⌊r÷2 |
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z←z t[1+t≥0] |
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r←r+q×t≥0 |
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r z q |
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}⍣{ r z q←⍺ |
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q≤1 |
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}⊢0 x q |
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}</lang> |
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{{output}} |
{{output}} |
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<pre> |
<pre> |
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