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7-4 harmonic average
2022-07-06 16:43:00 【HBUcs2020】
Record a very stupid mistake
n-- after n Finally changed to 0, I still use n To divide
#include<iostream>
using namespace std;
int main()
{
int n;
cin>>n;
double sum=0;
int a=n;
while(n--)
{
double x;
cin>>x;
//printf(" %lf %lf\n",1/x,sum);
sum+=1/x;
}
//sum=sum/n;
//printf("%lf\n",sum/n);
printf("%.2f",1.0/(sum/a));
return 0;
}
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