It would be better if someone post English editorial of AtCoder contests!

I've written an English editorial: https://codeforces.net/blog/entry/71701

For problem C Can someone tell me what is wrong in my code I got WA in one test case

Your code here...import math
n,m,x = map(int,input().split())
#print(n,m,x)
for i in range(1,25):
    k = (x - m*i)//n    
    #print(k,i)
    if k<0:
        print((x-m*(i-1))//n)
        break
    if k==0:
        print(k)
        break
    if int(math.log10(k))+1 == i:
        print(min(10**9,k))
        break

Anybody else found this contest somewhat easier than a normal beginner contest?

can Somebody please explain to me more Problem E ? I have read both of the tutorials and still don't get it. Thank you

Hi all, for problem F, I did a (too simple) implementation. It obviously fail, but the problem is that I am not able to understand why it should return a shortest path that is not the lexicographically minimal. This is my code:

ll solve()
{
    int N, M;

    cin >> N >> M;

    string s;
    cin >> s;

    int counterOnes = 0;

    // here I just filter if there is no solution
    for (int i = 0; i < s.length(); ++i)
    {
        if (s[i] == '1')
        {
            ++counterOnes;
            if (counterOnes >= M)
            {
                cout << -1 << endl;
                return 0;
            }
        }
        else
        {
            counterOnes = 0;
        }
    }

    string out;
    int index = s.length() - 1;

    // if I reach this, there is a solution for sure
    while (index > 0)
    {
        // loop from the biggest step to 1
        for (int j = std::max(0, index - M); j < index; ++j)
        {
            if (s[j] == '1') continue;

            out += to_string(index - j);
            out += " ";
            index = j;
            break;
        }
    }

    out.pop_back();
    std::reverse(out.begin(), out.end());
    cout << out << endl;

    return 0;
}

I cannot identify a negative pattern to proof that this fails :( Is there a way to download/see the testcases, after the ATCoder contest terminates?

Thanks a lot for any help