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| #include<cstdio>
int main()
{
int c,t,f;
scanf("%d",&c);
double sum = 0;
for(int j = 0;j < c;++j)
{
sum = 0;
f= 1;
scanf("%d",&t);
for(int i = 1;i<=t;++i)
{
sum += 1/double((i*f));
f *= -1;
}
printf("%.2f\n",sum);
}
}
|
