#include<stdio.h>
#include<math.h>
int main()
{
int n;
double a,b,c,i,avg;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
scanf("%lf%lf%lf",&a,&b,&c);
avg=(a*(2.00/10))+(b*(3.00/10))+(c*(5.00/10));
printf("%.1lf\n",avg);
}
return 0;
}
#include<math.h>
int main()
{
int n;
double a,b,c,i,avg;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
scanf("%lf%lf%lf",&a,&b,&c);
avg=(a*(2.00/10))+(b*(3.00/10))+(c*(5.00/10));
printf("%.1lf\n",avg);
}
return 0;
}
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