= HangOver =
http://acm.zju.edu.cn/show_problem.php?pid=1045

{{{#!cplusplus
/*written by czk*/
#include <stdio.h>

int main() {
    while(1) {
        double l, t;
        int i;
        scanf("%lf", &l);
        if(l==0.0)
            break;

        t = 0.0;
        for(i = 1; t<l ;i++)
            t += 1.0/(i+1);
        printf("%d card(s)\n", i-1);
    }
}
}}}