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#F2584. Maxim and Matrix

    ID: 2590 传统题 2000ms 256MiB 尝试: 0 已通过: 0 难度: 6 上传者: 标签>构造动态规划数学算法思想提高难度共享题库Codeforces英文题面题目来源题面语言

Maxim and Matrix

题目描述

C. Maxim and Matrix
time limit per test
2 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output

Maxim loves to fill in a matrix in a special manner. Here is a pseudocode of filling in a matrix of size (m+1)×(m+1):

Maxim asks you to count, how many numbers m (1≤mn) are there, such that the sum of values in the cells in the row number m+1 of the resulting matrix equals t.

Expression (x xor y) means applying the operation of bitwise excluding "OR" to numbers x and y. The given operation exists in all modern programming languages. For example, in languages C++ and Java it is represented by character "^", in Pascal − by "xor".

Input

A single line contains two integers n and t (1≤n,t≤1012,tn+1).

Please, do not use the %lld specifier to read or write 64-bit integers in C++. It is preferred to use the cin, cout streams or the %I64d specifier.

Output

In a single line print a single integer − the answer to the problem.

Examples
Input
1 1
Output
1
Input
3 2
Output
1
Input
3 3
Output
0
Input
1000000000000 1048576
Output
118606527258

题目来源:fps-www.educg.net-codeforce-1-2833.xml.zip;FPS 共享题包,题包内第 2233 题。保留原作者与原赛事署名。