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  1.  
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4. #include <math.h>
  5. #define EPS 1e-6
  6. int main(void)
  7. {
  8. float a, b, c, disc, p,q,a1;
  9. scanf("%f,%f,%f", &a, &b, &c);
  10. printf("%.20f",a);
  11.  
  12. return 0;
  13. }
Success #stdin #stdout 0.01s 5276KB
stdin
1
stdout
1.00000000000000000000