#include <stdio.h> int main() { int i, n, k, sum; char input[24]; gets(input); if(input[1] == ' ') { n = input[0] - '0'; i = 2; } else { n = 10; i = 3; } k = i; while(input[i]) i++; k = i - k; sum = 1; for(i = n; i > 0; i -= k) sum *= i; printf("%d", sum); return 0; }
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