viết bằng c++ nha các bạn ngắn gọn dễ hiểu

`C`++:

#include <iostream>
using namespace std;
long long n,i,a[100001],q,d,j,m,x,y,s;
int main(){
cin>>m;
if (m<=10)
    cout<<m*7000;
else
    if (m>=11 && m<=20)
        cout<<70000 + (m-10)*8000;
    else
        if (m>=21 && m<=30)
            cout<<150000 + (m-20)*10000;
        else
            cout<<250000 + (m-30)*16000;
    return 0;

}

__________________

Xin Hay Nhất `!`

#include <bits/stdc++.h>
#define max 1e18
#define min -1e18
#define ll long long
#define ull unsigned long long
#define bigInt __in128
using namespace std;
int main() {
 ios_base::sync_with_stdio(false);
 cin.tie(0);
 cout.tie(0);
 #ifdef LOCAL
 freopen("task.inp","r",stdin);
 #endif
 //freopen("TIENNUOC.INP","r",stdin);
 //freopen("TIENNUOC.OUT","w",stdout);
 int n; ll s = 0;
 cin >> n;
 for (int i = 1; i <= 10 && n > 0; i++, n--) s = s + 7000;
 for (int i = 11; i <= 20 && n > 0; i++, n--) s = s + 8000;
 for (int i = 21; i <= 30 && n > 0; i++, n--) s = s + 10000;
 s = s + n*16000;
 cout << s;
 return 0;
}