#include <stdio.h>

int bai1(int a, int b) {
    if (b == 0)
        return a;
    else
        return bai1(b, a % b);
}

int main() {
    int num1, num2;
    printf("nhap a : ");
    scanf("%d", &num1);
    printf("nhap b : ");
    scanf("%d", &num2);
    printf("uoc chung lon nhat cua %d v %d l %d\n", num1, num2, bai1(num1, num2));
    return 0;
}

