AOJ 0019 Factorial
#include <cstdio> int main() { int n; scanf("%d\n", &n); long long m = n; while(--n) m *= n; printf("%lld\n", m); return 0; }
#include <cstdio> int main() { int n; scanf("%d\n", &n); long long m = n; while(--n) m *= n; printf("%lld\n", m); return 0; }