The Sum of the k-th Powers

622F2600· international gm2s256 MB⌨ stdin/stdout

Examples

Sample 1of 4

Input

4 1

Output

Sample 2of 4

Input

4 2

Output

Sample 3of 4

Input

4 3

Output

Sample 4of 4

Input

4 0

Output

622F.cpp

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Ln 11·137 BGNU C++20 (64)