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- #include <iostream>
- using namespace std;
- unsigned nwd(unsigned a, unsigned b)
- {
- if(a * b == 0)
- return 0;
- while(a != b)
- {
- if(a > b)
- a -= b;
- else
- b -= a;
- }
- return a;
- }
- int main()
- {
- unsigned a,b;
- cin >> a >> b;
- cout << nwd(a, b) << endl;
- return 0;
- }
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