#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

int readline(char *buff)
{
  if(!gets(buff)) return EOF;

  int last = strlen(buff) - 1;
  while(last >= 0 && (buff[last] == '\r' || buff[last] == '\n'))
    buff[last--] = 0;

  return 1;
}

int isintstring (char *s) {
  if(*s == 0)
    return false;
  while (*s != '\0')
    if (!isdigit(*s++))
      return false;
  return true;
}

int isdoublestring (char *s) {
  if (!isdigit(*s++))
    return false;
  while (isdigit(*s)) s++;
  if (*s++ != '.')
    return false;
  if (!isdigit(*s++))
    return false;
  while (isdigit(*s)) s++;
  if (*s++ != '\0')
    return false;
  return true;
}

struct inputval {
  enum { Int, Double, String } tag;
  union {
    int theint;
    double thedouble;
    char* thestring;
  } value;
};

int main (void) {
  struct inputval input[1000];
  char buff[100];

  int n = 0;
  while(readline(buff) != EOF) {
    if (isintstring(buff)) {
      input[n].tag = Int;
      input[n].value.theint = atoi(buff);
    }
    else if (isdoublestring(buff)) {
      input[n].tag = Double;
      input[n].value.thedouble = atof(buff);
    }
    else {
      input[n].tag = String;
      input[n].value.thestring = malloc(strlen(buff) + 1);
      strcpy(input[n].value.thestring, buff);
    }
    n++;
  }

  for (int i = 0; i < n; i++)
    if (input[i].tag == Int) {
      int j = input[i].value.theint;
      if (0 <= j && j < n) {
        struct inputval *v = &input[j];
        switch (v->tag) {
        case String:
        {
          int l = strlen(v->value.thestring);
          char *newstr = malloc(2 * l + 1);
          strcpy(newstr, v->value.thestring);
          strcat(newstr, v->value.thestring);
          free(v->value.thestring);
          v->value.thestring = newstr;
          break;
        }
        case Int:
          v->value.theint++;
          break;
        case Double:
          v->value.thedouble *= 2.0;
          break;
        }
      }
    }

  // print result and free memory
  for (int i = 0; i < n; i++) {
    switch (input[i].tag) {
    case Int:
      printf("%d\n", input[i].value.theint);
      break;
    case Double:
      printf("%f\n", input[i].value.thedouble);
      break;
    case String:
      printf("%s\n", input[i].value.thestring);
      free(input[i].value.thestring);
      break;
    }
  }

  return 0;
}