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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. int main(void) {
  5. int i;
  6. for(i=1;20*log(i/1)<86;i++);
  7. printf("%d %f\n",i,20*log(i/1));
  8. return 0;
  9. }
Success #stdin #stdout 0.01s 1720KB
stdin
Standard input is empty
stdout
74 86.081302