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Algorithm/Maths/NumberTheory/gcd.cpp

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