#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int Fac(int n)
{
int i = 0;
int ret = 1;
for (i = 1; i <= n; i++)
{
ret *= i;
}
return ret;
}
int main()
{
int n = 0;
scanf("%d", &n);
int ret = Fac(n);
printf("%d\n", ret);
return 0;
}
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#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int Fac(int n)
{
int i = 0;
int ret = 1;
for (i = 1; i <= n; i++)
{
ret *= i;
}
return ret;
}
int main()
{
int n = 0;
scanf("%d", &n);
int ret = Fac(n);
printf("%d\n", ret);
return 0;
}
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