版权声明:假装有个原创声明……虽然少许博文不属于完全原创,但也是自己辛辛苦苦总结的,转载请注明出处,感谢! https://blog.csdn.net/m0_37454852/article/details/88360319
#include <algorithm>
#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;
int main()
{
int N;
while(scanf("%d", &N) != EOF)
{
long long int R = 1;
for(int i=2; i<=N; R*=i, i++);
printf("%lld\n", R);
}
return 0;
}