Submit solution
Points:
5.00 (partial)
Time limit:
1.0s
Memory limit:
1G
Input:
stdin
Output:
stdout
Author:
Problem type
Allowed languages
C, C++, GAS64, Pascal, Perl, PHP, Python, Sed, TCL, Text
Cho số ~n~ hãy tính ~S = 1 + 2 + 4 + 8 + 16 + 32 + ... + n~ (với ~n <= 31~)
Input: ~n~
Output: Đưa ra tổng ~S~
Ví dụ:
Input
8
Output
15
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