C :

#include<stdio.h>

void main(){
    int i,n;
    double x;
    scanf("%lf%d",&x,&n);

    for(i=1;i<=n;i++){
        x=x+x*0.001;
    }
    printf("%.4f",x);
}

C++ :

#include <bits/stdc++.h>
using namespace std;

int main(){
	int x,n;
	cin>>x>>n;
	double r = x;
	for(int i = 1;i <= n;i++){
		r = r * 1.001;
	}
	cout<<fixed<<setprecision(4)<<r<<endl;
}

Python :

n = input().split()
a = int(n[0])
b = int(n[1])
su = 0
for i in range(1, b + 1):
    su = a * (1 + 0.001) ** i
print('%.4f' % su)