result to 0 and MOD to 1000000007 (10^9 + 7).length to 0, which will keep track of the current length of the binary representation.i from 1 to n:
a. If i is a power of 2, increment length (since the binary representation of i will be one bit longer).
b. Shift result to the left by length bits.
c. Use bitwise OR to add i to result.
d. Apply modulo MOD to keep the result within the integer range.result after the loop.