In problem 2028F - Alice's Adventures in Addition, when I hack other's code, the return verdict is "Unexpected verdict", can someone tells me why, thanks.

@applepi216

And this is my generator

#include<bits/stdc++.h>
using namespace std;
mt19937 rnd(233);
main()
{
	int t=1,n=2e5,m=1e4;
	cout<<t<<endl;
	cout<<n<<' '<<m<<endl;
	for(int i=1;i<=n;i++)
	{
		if(i==1||i==2)cout<<1;
		else if(i==n)cout<<int(1e4);
		else
		{
			if(rnd()%1000==0)cout<<0;
			else cout<<2;
		}
		cout<<" \n"[i==n];
	}
}

Hi, Codeforces!

We are so happy to invite you to participant in The 20th Southeast University Programming Contest (Summer), which will start at May/26/2024 09:00 (Moscow time).

This round will be conducted according to ACM/ICPC rules. Therefore, solutions will be judged on all test points during the competition.

The competition is team-based, with teams of 1 to 3 people, and you will be given 11 to 13 problems and 5 hours to solve them.

Please note that the penalty for submitting an incorrect answer in this competition is 20 minutes.

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In this problem H. Tree Diameter 's tag, we could find its difficulty is 2000, but actually it is the last problem of a div1+div2 round. Is this a mistake?