```cpp
#include<iostream>
#include<iomanip>
#include<vector>
#include<cmath>
using namespace std;
int change(int a)
{
if (a==0)
{
return 1;
}
if (a == 1)
{
return 0;
}
}
int main()
{
int n;
cin >> n;
vector<double>a(n);
vector<int>t(n);
vector<int>b(20000001,0);
for (int i = 0; i < n; i++)
{
cin >> a[i] >> t[i];
}
for (int i = 0; i < n; i++)
{
for (int j = 1; j <= t[i]; j++)
{
b[floor(a[i]*j)] = change(b[floor(a[i] * j)]);
}
}
for (int i = 0; i < 20000001; i++)
{
if (b[i] == 1)
{
cout << i << endl;
}
}
return 0;
}
```
by zhaoanqiEtayo @ 2023-12-30 18:36:03