import os

from collections import Counter

if (os.path.isfile("./input")):
    input = open("./input", "r").read()
else:
    input = "11-22,95-115,998-1012,1188511880-1188511890,222220-222224,1698522-1698528,446443-446449,38593856-38593862,565653-565659,824824821-824824827,2121212118-2121212124"


result = 0

for r in input.split(','):
    r = r.split('-')
    for i in range(int(r[0]), int(r[1]) + 1):
        s = str(i)
        if (s[:len(s) // 2 + len(s) % 2] == s[len(s) // 2 + len(s) % 2:]):
            result += i;

print(result)