C++ :

#include<bits/stdc++.h>
using namespace std;
double n,m;
int a;
int main()
{
cin>>n>>m;

while(n<m)
	{
	a++;
	n=n*1.03;
	}
cout<<a;
return 0;
}

Python :

# coding=utf-8
n= input()
m= input()
n = int(n)
m = int(m)
s = 0
while(n<m):
    s = s + 1
    n = n*(1+0.03)
print(s)