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- #include <iostream>
- using namespace std;
- int gcd(int a, int b) {
- if (b == 0)
- return a;
- a = a % b;
- return gcd(b,a);
- }
- int main() {
- int a, b;
- cin >> a >> b;
- cout << gcd(a,b) << endl;
- }
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