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FACVSPOW.cpp
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#include<stdio.h>
#include<math.h>
double dp[4000007];
inline double fun(int n)
{
double t;
if (dp[n] != 0)
{
// t = dp[n];
return dp[n];
}
else
{
t = log(n);
// dp[n] = t;
return dp[n]=t + (1.837877066 + t) / (n << 1);
}
}
int main()
{
double a, temp;
int n;
int t;
scanf("%d", &t);
while (t--)
{
scanf("%d", &n);
a = 1 + log(n);
// printf("%lf\n", a);
int initial = 4, end = 3000000, mid;
mid = (initial + end) >> 1;
temp = fun(mid);
// printf("%lf\n", temp);
if (temp > a)
{
while (temp > a && end > initial)
{
end = mid;
mid = (initial + end) >> 1;
temp = fun(mid);
}
if (temp <= a)
{
initial = mid + 1;
while (end > initial)
{
mid = (initial + end) >> 1;
temp = fun(mid);
if (temp > a)
{
end = mid;
}
else if (temp <= a)
{
initial = mid + 1;
}
if (end == initial)
{
mid = end;
break;
}
}
}
// printf("%d\n", mid);
}
else
{
while (temp < a && end > initial)
{
initial = mid;
mid = (initial + end) >> 1;
temp = fun(mid);
}
end = mid;
while (end > initial)
{
mid = (initial + end) >> 1;
temp = fun(mid);
if (temp > a)
{
end = mid;
}
else if (temp <= a)
{
initial = mid + 1;
}
if (end == initial)
{
mid = end;
break;
}
}
}
printf("%d\n", mid);
}
return 0;
}