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author | Jack Sangdahl <[email protected]> | 2025-02-13 15:11:28 -0700 |
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committer | Jack Sangdahl <[email protected]> | 2025-02-13 15:11:28 -0700 |
commit | 19bb82f44e8da0ab854f93248a8fe72d430b46e4 (patch) | |
tree | 997771564cbee9ee34a1100c4d26019b40b20a2b /introductory_problems/readme.md | |
parent | 146f58d5d91133e43045df719b3f0ae7ad1266f0 (diff) | |
download | cses-19bb82f44e8da0ab854f93248a8fe72d430b46e4.tar.gz cses-19bb82f44e8da0ab854f93248a8fe72d430b46e4.zip |
1617. bit strings
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diff --git a/introductory_problems/readme.md b/introductory_problems/readme.md index 9607312..0550440 100644 --- a/introductory_problems/readme.md +++ b/introductory_problems/readme.md @@ -55,3 +55,10 @@ Your task is to divide the numbers `1, 2, ..., n` into two sets of equal sum. **Input**: The only input line contains an integer `n`. (Example: 7) **Output**: Print "YES", if the division is possible, and "NO" otherwise. After this, print if the division is possible, print an example of how to create the sets. + +### Bit Strings +Your task is to calculate the number of bit strings of length `n`. For example, if `n = 3`, the correct answer is 8, because the possible bit strings are `000`, `001`, `010`, `011`, `100`, `101`, `110`, and `111`. + +**Input**: The only input line has an integer `n`. (Example: 3) + +**Output**: Print the result modulo 10E9 + 7. (Example: 8) |