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GCD with a Loop

Read two positive integers a and b from input. Use a loop (the Euclidean algorithm) to compute their greatest common divisor, and print it followed by a newline. For input 12 18 the exact output is what is shown in Expected Output.

Repeat a % b, moving b into a and the remainder into b, until b becomes 0.

Expected Output:

6

= newline. The output ends with a newline — print one after the last line.

Hints4 available
Topics:
Loops
📥 Auto-Input:
12 18\n
This input is automatically fed to your program's stdin
1
Tab to indent (Esc then Tab to move on) · Ctrl+Enter to run · Shift+Alt+F to format · Ctrl+Space to expand shortcuts (cout, fori)

Your Output

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Test Cases

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