Description

这是一道很简单的数数题，只需要统计如下0-1串中1的个数，然后输出这个数。
So Easy ？
1100100000111111101010010010011010101110110110111010011111100100000000010100011011000000100101100011111000101011000111100010111010001000111111111110100000100101010101110010000101001011000011010111011010110110010001101111110100000001101100000101011001000100001110001001111001100011101111010100110010110100110110100111101111011110010010010101111100011010001000111010010110001101000011010110000001101101101001001101111010111011110000001010001110011000101100001001100010010001010110010011101110100010111100000011111000010101010011100110101011100010101010001100010111110010101111111001100000110111111010100111111000110011101001010010111100110001010110001001110010110110100011010111100110111110101111100101001010001101110101100011100001111001001011100010111010100011000101111101110110111111000010000011000101101011001110010011111001001100000011010011100100000001110111100000110000101010001110000001101011011001000111010111110011010010100111111100101111010000100001111100101001101011000011011111010100110001

Input

本题没有输入

Output

如描述所述，只输出一个数。

Sample Input

Sample Output

HINT

Source

NBU OJ