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  1. #include <stdio.h>
  2. int gcd(int m,int n){
  3. if(n==0){
  4. return m;
  5. }else{
  6. return gcd(n,m%n);
  7. }
  8. }
  9. int main(void) {
  10. int a,b;
  11. scanf("%d,%d",&a,&b);
  12. printf("%d",gcd(a,b));
  13. return 0;
  14. }
  15.  
Success #stdin #stdout 0s 5316KB
stdin
3,15
stdout
3