C题数据生成器

#include<bits/stdc++.h>
using namespace std;
int t, n, m, mod=1e9, modn=2e5, a;

int main()
{
    ios::sync_with_stdio(false);
    srand(time(NULL));
    n = (rand()*rand())%modn+1;
    cout<<n<<endl;
    for (int i=1; i<=n; i++)
    {
        a = (rand()*rand())%mod;
        m = (rand()*rand())%mod;
        cout<<a<<" "<<m<<endl;
    }    
}