#include <cstdio>
using namespace std;
int c[1000000],n;
int main() {
    c[0]=1;
    int i,j,k,l=0,ans=0;
    scanf("%d",&n);
    for (k=2;k<=n;k++) {
        for (i=0;i<=l;i++)
            c[i]*=k;
        for (i=0;i<=l;i++) {
            c[i+1]+=c[i]/10;
            c[i]%=10;
        }
        while (c[i]>10) {
            c[i+1]+=c[i]/10;
            c[i]%=10;
            i++;
        }
        l=i;
        while (c[l]==0&&l>0) l--;
    }
    for (i=0;i<=l;i++) ans+=c[i];
    printf("%d",ans);
    if (ans==2||ans==3) printf("T\n");
    else printf("F\n");
    return 0;
}

第三个点啊，怎么就过不了呢？