Playing with bits problem statement

I did not undestand this problem. In sample input 2 is number of queries, 10 and 15 are integers but what is 1 and 1 in the second line. Also didn’t understand the sample output. Please clear both of them once.

@sb1251224_6919c19fccd96630,
here u need to print the sum of no of all set bits from range inclusive

Sample Input
2
1 1
10 15

Sample Output
1
17

here 2 queries are asked (line 1)
first query has 2 numbers 1,1 you need to output sum of no of all setbits form 1 to 1
second query has 2 numbers 10,15 you need to output sum of no of all setbits form 10 to 15

ans is
1
17 respectively

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