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View Compilation Error

0_0_39806746_29549.cpp: In function 'int lcm(int, int)':
0_0_39806746_29549.cpp:8:22: error: 'gcd' was not declared in this scope
    8 |     return (a * b) / gcd(a, b); // ²»ÔÙÐèÒª std::
      |                      ^~~


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