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- int gcd(int a, int b){
- // Nếu a = 0 => ucln(a,b) = b
- // Nếu b = 0 => ucln(a,b) = a
- if (a == 0 || b == 0){
- return a + b;
- }
- while (a != b){
- if (a > b){
- a -= b; // a = a - b
- }else{
- b -= a;
- }
- }
- return a; // return a or b, bởi vì lúc này a và b bằng nhau
- }
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