NY10E - Non-Decreasing Digits
A number is said to be made up of non-decreasing digits if all the digits to the left of any digit is less than or equal to that digit.For example, the four-digit number 1234 is composed of digits that are non-decreasing. Some other four-digit numbers that are composed of non-decreasing digits are 0011, 1111, 1112, 1122, 2223. As it turns out, there are exactly 715 four-digit numbers composed of non-decreasing digits.
Notice that leading zeroes are required: 0000, 0001, 0002 are all valid four-digit numbers with non-decreasing digits.
For this problem, you will write a program that determines how many such numbers there are with a specified number of digits.
Input
The first line of input contains a single integer P, (1 ≤ P ≤ 1000), which is the number of data sets that follow. Each data set is a single line that contains the data set number, followed by a space, followed by a decimal integer giving the number of digits N, (1 ≤ N ≤ 64).
Output
For each data set there is one line of output. It contains the data set number followed by a single space, followed by the number of N digit values that are composed entirely of non-decreasing digits.
Example
Input:
3
1 2
2 3
3 4
Output:
1 55
2 220
3 715
hide comments
prateek1985:
2016-02-27 13:07:44
Awesome problem for dp beginners :) |
|
abc_c:
2016-02-11 14:41:54
Too Easy...
|
|
Akshay Damle:
2016-01-27 22:54:45
30 sec to debug and then AC in 1 go :D |
|
BRAIN:
2015-12-31 14:05:09
O(P + 65 * 9) is enough ! |
|
kapoor_adhish:
2015-12-17 12:33:38
AC in first go!!
|
|
subhstar:
2015-11-14 22:33:15
first dp without any help.. :) |
|
Ravi:
2015-10-22 21:11:27
DP + precomputation and solved in 0.0 :) |
|
topke:
2015-10-22 11:51:11
Use long long |
|
twist akid sultan:
2015-10-09 20:28:29
An easy dp.... can be solved by direct formula too. |
|
just_code21:
2015-09-25 19:28:45
O(10*n)...easy one... |
Added by: | John Mario |
Date: | 2011-03-22 |
Time limit: | 1s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ASM64 |
Resource: | ACM Greater New York Regionals 2010 |