#include <bits/stdc++.h>

using namespace std;

int main() {
    int balance = 100;
    //balance = balance + 10;
    balance += 10;
    cout << balance << endl;
    // balance=balance-20;
    balance -= 20;
    cout << balance << endl;
    balance = 0;
    cout << balance << endl;
    return 0;
}