#include<iostream>
#include<cmath>
using namespace std;
const double c=0.0065;
const double C=-0.0014;
double xx(double t){
	double tt=t/600;
	double x=c+C*pow(0.109164*tt+1,-2.75229357798165);
	return x;
}
int main()
{
	for(int i=0;i<=3000;i++){
		cout<<"第"<<i/10<<"."<<i%10<<"秒的锰元素质量百分比是"<<xx(i)<<"\n"; 
	}
	getchar();
}