赠送数据生成器

#include<iostream>
#include<time.h>
using namespace std;
int main()
{
    freopen("data.in","w",stdout);
    srand(time(0));
    int n=rand()%8+1;
    int m=rand()%30+1;
    cout<<n<<" "<<m<<endl;
    for(int i=2;i<=n;i++)
    {
        int fa=rand()%(i-1)+1;
        cout<<fa<<" "<<i<<endl;
    }
    for(int i=1;i<=m;i++)
    {
        int op=rand()%2;
        if(op==0)
            cout<<op<<" "<<rand()%n+1<<endl;
        else
            cout<<op<<" "<<rand()%n+1<<endl;
    }
}