题解 - 苏州市吴江区中学生信息编程竞赛域

-1
12206戴爱佳 (12206戴爱佳) LV 7 @ 2021-12-17 16:22:32

#include<iostream>
#include<cmath>
#include<iomanip>
using namespace std;
int main()
{
double s,r1;
cin>>r1>>s;
cout<<s*2-r1*1.0;
return 0;
}
-1
12234洪子昊 (12234洪子昊) LV 8 @ 2021-11-08 20:57:33

#include<iostream>
#include<cmath>
#include<iomanip>
using namespace std;
int main()
{
double s,r1;
cin>>r1>>s;
cout<<s*2-r1*1.0;
return 0;
}
平均数*2-r1=r2
-1
12228王晨 (12228王晨) LV 7 @ 2021-10-31 20:27:29

#include<iostream>
using namespace std;
int main()
{
long s,r1;
cin>>r1>>s;
cout<<s*2-r1;
return 0;
}