A. Factorialtime limit per test2 secondsmemory limit per test64 megabytesinputstandard inputoutputstandard outputPrint the factorial of the given integer number n. The factorial of n is equal to 1·2·...·n.InputThe only line contains n (1 ≤ n ≤ 10).OutputPrint the factorial of n.ExamplesInput3Output6Input5Output120
Input3
Output6
['*special problem', 'implementation', '*1300']