sorry ,忘了改变量d了,qwq已AC
```
#include <iostream>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <iomanip>
using namespace std;
int main()
{
double s,d = 2,sum = 0;
int cnt = 1;
cin >> s;
sum += d;
while(sum < s)
{
d *= 0.98;
sum += d;
cnt++;
}
cout << cnt;
return 0;
}
```
by MuYuMC @ 2024-05-26 21:10:20