Go: package main

import "fmt"

var (
	dept    float64 = 100000
	addDept float64 = dept * 0.05
)

func main() {
	var week int
	var nWeekDept float64
	fmt.Scan(&week)

	nWeekDept = dept + (addDept * float64(week))

	if int(nWeekDept)%1000 != 0 {
		nWeekDept += addDept
	}
	fmt.Println(nWeekDept)
}

C++: //include
//------------------------------------------
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>

using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) {int v; istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}

//math
//-------------------------------------------
template<class T> inline T sqr(T x) {return x*x;}

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;
typedef unsigned long long ULL;

//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

//constant
//--------------------------------------------
const double EPS = 1e-10;
const double PI  = acos(-1.0);

//clear memory
#define CLR(a) memset((a), 0 ,sizeof(a))

//debug
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define debug(x) cerr << #x << " = " << (x) << " (L" << __LINE__ << ")" << " " << __FILE__ << endl;

int main() {
  int n;
  double money = 100000, rate = 0.05, interest;

  cin >> n;

  REP(i, n) {
    interest = money * rate;
    money += interest;
    money = (int)money / 1000;
    money *= 1000;
    if((int)interest % 1000 > 0) money += 1000;
  }
  cout << (int)money << endl;
}

C++: #include <iostream>
using namespace std;

int main() {
  int n;
  cin >> n;
  int ans = 100000;
  for (int i=0;i<n;i++) {
    int a = 0.05*ans;
    if (a%1000)
      a = (a / 1000 +1) * 1000;
    ans += a;
  }
  cout << ans;
}

C++: //http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=0007&lang=jp
#include <iostream>
#include <cstdio>
#include <string>
#include <cmath>
#include <algorithm>
#include <vector>
#include <map>
#include <set>
#include <array>
#include <numeric>
#include <functional>

#define rep(i,n) for(int i=0;i<n;i++)
#define scanInt(i) scanf("%d", &i)

using namespace std;


int main(){

	int init = 100000;
	double r = 1.05;

	int n;
	scanInt(n);
	rep(i,n){
		init *= r;
		if(init % 1000 != 0){
			int a = init / 1000;
			a+=1;
			init = a*1000;
		}
	}
	printf("%d\n", init);

	return 0;
}

C++: #include <iostream>
#include <iomanip>
#include <cmath>
#include <string>
#include <algorithm>

using namespace std;

int main()
{
    unsigned int n = 100000;
    int week;
    
    cin >> week;
    
    for (int i = 0; i < week; i++)
    {
        n *= 1.05;
        if (n % 1000 > 0)
        {
            n = (n / 1000 + 1) * 1000;
        }
    }
    
    cout << n << endl;
    
    return 0;
}

C++:  #include <iostream>
#include <math.h>
using namespace std;
int main(){
	int n ;
	double x=100000;
	cin >> n;
	for( int i=0 ; i<n ; i++ ){
		x = x * 1.05 ;
		x = x / 1000;
		x = ceil(x);
		x = x*1000;
	}
	cout << x << endl;
}

C++: #include <iostream>

int main(){
  int n;
  int debt = 100000;
  
  std::cin >> n;
  for(int i=0; i<n; i++){
    debt = round((double)debt * 1.05);
    int under = debt % 1000;
    if(under==0)
    else{
      debt = debt - under + 1000;
    }
  }
  std::cout << debt << std::endl;
  
  return 0;
}

C++: #include <iostream>
#include <math.h>
using namespace std;

void test3()???
int interest(int debt, double interest_rate,int n);


int main(void)
{
	test();
	return 0;
}

void test()
{
	int debt,n;
	debt = 100000;
	cin >> n;

	debt = interest(debt, 1.05, n) ;

	if (debt % 1000 > 0)
	{
		debt = debt - (int)debt % 1000 + 1000;
	}
	
	cout << debt << endl;
}

int interest(int debt, double interest_rate,int n)
{

	if (n == 0)
		return debt * interest_rate;
	else
		return ceil(interest(debt, interest_rate, n - 1) * interest_rate);
}

C++: #include <stdio.h>
int main(void) {
	int a,c,i;
	int b;
	scanf_s("%d", &a);
	b = 100000;
	for (i = 0; i < a; i++) {
		b = b * 1.05;
	}
	c = b % 10000;
	if (c!=0) {
		b = b + 10000-c;
	}
	printf("%d", b);
	return 0;
}

C++: #include<iostream>
using namespace std;

int main()
{
    int n;
    cin >> n;
    int loan = 100000;
    for(int i=0; i<n; i++){
        loan = loan * 1.05;
    }

    loan = loan/10000;
    loan = loan * 10000;
    loan = loan + 10000;
    
    cout <<loan<<endl;
    
    return 0;
}

C++: #include<iostream>

using namespace std;

int main(void){
	long money = 100000;
	int n;
	cin >> n;
	for(int i = 0; i < n; i++){
		money *= 1.05;
		if(money / 100 % 10) money = (int)money/1000*1000 + 1000;
	}
	cout << money << endl;
	
	return 0;
}

C++: #include <iostream>
#include <cmath>

using namespace std;
int main() {
  int n;
  double money = 100000;
  cin >> n;
  for (int i = 0; i < n; i++) {
    money += money * 0.05;
  }
  cout << 1000 * ceil(money / 1000) << endl;
  return 0;
}

C++: #include <iostream>

using namespace std;

int main()
{
    unsigned long long debt = 100000;
    int n;
    
    for (int i = 0; i < n; ++i) {
        debt *= 1.05;
        debt -= (debt % 1000) - 1000;
    }
    cout << debt << endl;
    
    return 0;
}

C++: #include <iostream>
#include <cmath>

using namespace std;

int main() {
	int n, money = 100000;
	cin >> n;

	for (int i = 0; i < n; i++) {
		money *= 1.05;
		if (money % 1000 == 0) {
			continue;
		}
		money += 1000 - money % 1000;
	}

	cout << money << endl;

	return 0;
}

C++: #include <iostream>
#include <cmath>

int main() {
	int loan = 100000;
	int hoge = loan * 0.05;
	int n;
	std::cin >> n;

	for (int i = 0; i < n; i++)
		loan += hoge;

	if (loan % 1000 < 500)
		loan = loan / 1000 * 1000;
	else
		loan = loan / 1000 * 1000 + 1000;
	
	std::cout << loan << std::endl;
}

C++: #include<stdio.h>

int main(){
	int C = 100000,n;
	scanf("%d",&n);
	for(int i = 0;i < n;i++){
		C = (C*21)/20;
		if(C%1000 > 0)
			C += 1000-C%1000;
	}
	printf("%d\n",C);
	return 0;
}

C++: #define _USE_MATH_DEFINES
#include <iostream> 
#include <math.h>
#include <vector>
#include <algorithm>
using namespace std; 
int main(){
	int n, r;
	int d = 100000;
	cin >> n;
	for(int i = 0; i < n; i++){
		r = d*1.05;
		r = (r + 999) / 1000 * 1000;
		/*
		if(r%1000!=0){
			while(r%1000!=0){
			r = r+1;
			}
		}
		*/
		d = r;
	}
	cout << d << endl;
	return 0;
}

C++: #include<cstdio>
#include<cmath>

int Money =100000;
int n;
int main()
{
	scanf("%d",&n);
	for(int i =0;i<n;i++)
	{
		Money*=1.05;
	 	int amari = Money%1000;
		if(amari!=0)Money=Money-amari+1000;
	}
	printf("%d\n",Money);
	return 0;
}

C++: #include<iostream>
#include <string.h>
using namespace std;

int main(){
 int i,n,sum=100000;
 cin>>n;
 for(i=0;i<n;i++){
	 sum *=1.05;
	 //cout<<sum<<endl;
	 if((sum%1000)>0){
		sum=sum-sum%1000;
		sum+=1000;
	 }
 }
 cout<<sum<<endl;
}

C++: #include <iostream>
using namespace std;
 
int main() {
    int n, d = 100000;
	cin >> n;
    for (int i = 0; i < n; i++) {
        d = d * 1.05;
        if (d % 1000 > 0) {
            d = d - (d % 1000) + 1000;
        }
    }
    cout << d << '\n';
    return 0;
}