>>544
#include<stdio.h>
int gcd(int a, int b){
int t;
if(b==0) return a;
if(b>0) return gcd(b,a%b);
}

int lcm(int a, int b){
return a*b/gcd(a,b);
}

int main(){
int a=17,b=11;
printf("gcd(%d,%d)=%d\n",a,b,gcd(a,b));
printf("lcm(%d,%d)=%d\n",a,b,lcm(a,b));
return 0;
}
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