#include <stdio.h>
#include <stdlib.h>
#define BSIZE	100
#define PMAX	50

struct age65 {
  char	pref[20];
  int	total;
  int	over65;
  float	ratio65;
};

int compare_age65(const void *x, const void *y)
{
  struct age65 *a = (struct age65 *)x;
  struct age65 *b = (struct age65 *)y;
  float epsilon = 0.00002;
  if (a->ratio65 - b->ratio65 > epsilon)
    return -1;
  else if (b->ratio65 - a->ratio65 > epsilon)
    return 1;
  else
    return 0;
}

output_csv(struct age65 x[], int n)
{
  int i;
  for (i=0; i<n; i++) {
    printf("%s,%.3f\n", x[i].pref, 100*x[i].ratio65);
  }
}

int main(int argc, char *argv[])
{
  int n, fields;
  FILE *fp;
  char buf[BSIZE];
  struct age65 data[PMAX];
  if (argv[1] == NULL) {
    fp = stdin;
  } else {
    if (NULL == (fp=fopen(argv[1], "r"))) {
      fprintf(stderr, "%s ファイルを用意しといてね(^_-)\n", argv[1]);
      exit(1);
    }
  }
  /* 読み込み開始 */
  n=0;
  while (NULL != fgets(buf, BSIZE, fp)) {
    fields = sscanf(buf, "%19s %d %d",
                    data[n].pref, &data[n].total, &data[n].over65);
    if (fields == 3) {
      data[n].ratio65 = (float)data[n].over65/data[n].total;
      n++;
    }
  }
  if (fp != stdin)
    fclose(fp);
  qsort(data, n, sizeof data[0], compare_age65);
  output_csv(data, n);
}