Given 4 billion numbers, how to find a number which is not in these 4 billion numbers? We have only 1GB of memory
47109
Generate an integer that is not among four billion given ones
133481
How to find the smallest number with just $0$ and $1$ which is divided by a given number?
132104
Removing not-a-number entries from an array of numbers
150652
Number of 4-digit numerals with at most 2 different digits
69222
Find XOR of all numbers in a given range
129693
An interesting problem with "decomposing" natural numbers.
104826
Determine Whether Integer Is Between Two Other Integers?
48480
Find two elements that don't have a gcd in a subring of Gaussian integers
20787
How to find the only number in an array that doesn't occur twice
98850
A positional number system for enumerating fixed-size subsets?
36486
Finding the total number of set-bits from 1 to n
17410
Get all possible partitions of number
38535
How to find a file whose size is less than 10 MB?
86057
What variable type for extremely big integer numbers?
84828
Given n coins, some of which are heavier, find the number of heavy coins?
54672
If 32-bit machines can only handle numbers up to 2^32, why can I write 1000000000000 (trillion) without my machine crashing?
36616
How Does One Remove Duplicate Text Lines From Files Larger Than 4GB?