HDU 1012

#include <cstdio>  
#include <cstring>  
#include <cmath>  
  
int main() {  
    double e;  
    int i, tmp;  
    e = 1;  
    tmp = 1;  
    printf("n e\n");  
    printf("- -----------\n");  
    printf("0 1\n");  
    for(i = 1; i < 10; i++) {  
        tmp *= i;  
        e += 1.0/tmp;  
        if(i>=3) printf("%d %.9lf\n", i, e);  
        else if(2 == i) printf("%d %.1lf\n", i, e);  
        else printf("%d %.0lf\n",i, e);  
    }  
    return 0;  
}