MOJThe 2026 ICPC Latin America Regional Finalscontest report
Clarifications
Questions and answers. Who asked and who answered stay anonymous.
General · 11-07 17:01 (min 1) · Public
where are time limits?
As during the warmup, time limit information is available through MOJ.
Each problem specifies its time limit. Additionally, the Files & Resources section contains a PDF titled Time Limits, which lists the time limits for all problems in one place (a printed copy can be requested if needed).
A · 11-07 17:14 (min 14) · Private
es posible que nos den la traduccion del problema a el español?
No. Did you consider bringing a dictionary with you?
J · 11-07 17:34 (min 34) · Private
Could a number in the output be less than 2?
Read the statement please.
G · 11-07 17:41 (min 41) · Private
El sample input 1 es erróneo: dice "1 2 3 2" y debería ser "1 2 3 4" según la explicacion.
Please read the statement carefully.
J · 11-07 17:43 (min 43) · Private
What does "pairwise" mean
Please search it in your dictionary.
General · 11-07 17:45 (min 45) · Private
Submission for E is not giving a verdict, has gone for like 6 minutes.
We are aware, it will be judged soon
F · 11-07 17:48 (min 48) · Private
Mi submission se quedó congelada, hay penalidad por resubmission?
This information is described on the Info Sheet.
If your pending submission receives an WA/TLE/RTE it will add to your penalty.
If your pending submission is Accepted, other submissions on the same problem afterwards won't contribute to your penalty.
D · 11-07 17:49 (min 49) · Private
Can you provide another test cases? We think that our solution is correct, but the message is "Wrong answer", not "Time exceeded". We would like to know in which case it failed
We cannot provide extra tests :(
F · 11-07 17:57 (min 57) · Private
Acho que a nossa submissao da F esta travada, a dos outos times esta corrigindo instantaneamente e a nossa esta demorando bastante.
Please share the submission id.
J · 11-07 18:01 (min 61) · Private
Se puede considerar un chocolate como un rectangulo?
Please rephrase your question, I do not understand it.
J · 11-07 18:06 (min 66) · Private
The first and second sample have same input but different output, is okey? any answer is valid?
Read the Output section.
J · 11-07 18:07 (min 67) · Private
que significa pairwise (preferecia en español)?
Please search it in your dictionary.
F · 11-07 18:13 (min 73) · Private
Example 1:
Choosing 2 as the skill will get me 1 1 3 1, which is also 2 tool changes. But the explanation says: Choosing another skill does not reduce the number of tool changes.
"does not reduce the number of tool changes" means "does not produce a number of tool changes less than 2".
C · 11-07 18:14 (min 74) · Private
Nosso problema ainda nao foi julgado
It should be judged by now
J · 11-07 18:20 (min 80) · Private
The four pieces must have different amount of squares or only different ordered pair numbers for its sides?
Please read the statement carefully.
General · 11-07 18:31 (min 91) · Private
//we can't save files, please hold this
#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector,inline")
#include <bits/stdc++.h>
using namespace std;
#define fore(i,l,r) for(auto i = (l) - ((l) > (r)); i != (r) - ((l) > (r)); i += 1 - 2 * ((l) > (r)))
#define all(x) begin((x)), end((x))
#define sz(x) int((x).size())
#define debug(...)
#ifdef LOCAL
#include "debug.h"
#endif
using ld = long double;
using lli = long long;
constexpr int M = 998244353;
struct Modular {
int v;
Modular(int a = 0) : v(a % M) {if(v < 0) v += M;}
Modular(lli a) : Modular(int(a % M)){}
bool operator== (const Modular&) const = default;
auto operator<=> (const Modular&) const = default;
Modular inv() const {return pow(M - 2);}
#define OP(o,x) Modular operator o(const Modular& m) const {return v o x;}\
Modular& operator o##=(const Modular& m) {return *this = *this o m;}
OP(+, m.v)OP(-, m.v)OP(*, 1LL * m.v)OP(/, 1LL * m.inv().v)
Modular pow(lli n) const{
Modular r(1), x = *this;
for(; n > 0; n >>= 1){
if(n & 1) r *= x;
x *= x;
}
return r;
}
friend ostream& operator<<(ostream& os, Modular m) {return os << m.v;}
};
int main(){
cin.tie(0)->sync_with_stdio(0), cout.tie(0);
return 0;
}
No response.
General · 11-07 18:34 (min 94) · Private
What do you mean by pairwise?
Consult a dictionary if available. Judges will only clarify actual ambiguities in the problem statement.
General · 11-07 18:57 (min 117) · Private
our computer have the g++ compiler bugged in a way that every break in a loop inside a function makes an illegal instruction error
No response.
General · 11-07 19:05 (min 125) · Private
desconsider our clarification, it was ours error
No response.
General · 11-07 19:08 (min 128) · Announcement
Clarification Policy and the Meaning of "Pairwise"
We have received a number of clarification requests asking about the meaning of the word "pairwise".
To address these requests, we would like to provide the following definition:
pairwise (adverb / adjective)
Definition: Involving, relating to, or comparing two things at a time, especially when considering all possible pairs within a group.
----
Please note that bringing a dictionary is permitted under the contest rules. However, we cannot guarantee that questions of this nature will be answered during other stages of ICPC competitions.
Clarifications are intended to resolve potential ambiguities or errors in the problem statement, or to address issues with the judging system. They are not intended to provide general explanations of terminology.
J · 11-07 19:08 (min 128) · Private
is the only condition for c,r to cut the chocolate in such a way that the 4 remaining squares are distinct in amount from one another? Especially due to the use of the term 'pairwise'
Please read the statement carefully.
J · 11-07 19:28 (min 148) · Private
All four segments has to be different?
Please read the statement carefully.
B · 11-07 19:35 (min 155) · Private
cuando la camara graba 2 gatos al mismo tiempo , osea misma angulo , cual va primero , o eso nunca sucede ?
Please read the statement carefully.
G · 11-07 19:53 (min 173) · Private
169 G Gratitude Loop src Wrong Answer 11/7/2026, 3:49:56 PM
Is it format error?
No response.
F · 11-07 20:01 (min 181) · Private
When Claudio takes a job for his father, does the tool change for the first removed job still get skipped?
e.g
1 3 2 3 2 -> 1 tool change
3 gets taken by charlie
1 2 2 -> 0 tool changes because the first tool change is skipped?
Read the statement carefully
D · 11-07 20:07 (min 187) · Private
cuando aparece tiempo excedido es porque cada punto tiene un limite para resolverse?
As during the warmup, time limit information is available through MOJ.
Each problem specifies its time limit. Additionally, the Files & Resources section contains a PDF titled Time Limits, which lists the time limits for all problems in one place (a printed copy can be requested if needed).
C · 11-07 20:08 (min 188) · Private
C specifies that an "Up" move moves from (r,c) to (r-1,c) and that a "Down" move moves from (r,c) to (r+1,c). However, these seem to have the opposite effect ("Down" moves up the grid, "Up" moves down the grid). Is this intentional?
Consider a coordinate system where increasing r means going down the grid.
E · 11-07 20:10 (min 190) · Private
Does the network always have the structure of a directed tree??
Please read the statement carefully.
General · 11-07 20:21 (min 201) · Private
What input sys do we need to use for the problem sets? We used import sys and stdin.readline stdout.write and it says wrong answer even when our code works with every test case and extra test cases we designed for further experimentation. We're working on the D problem
No response.
A · 11-07 20:26 (min 206) · Private
Posso printar espacos extras no final da linha?
Read Interaction section of the problem carefully, and Interaction in the Info Sheet.
F · 11-07 20:44 (min 224) · Private
Does the change after the last job (from that last tool to having no tool at all) count as a tool change?
Read the statement carefully
F · 11-07 20:44 (min 224) · Private
are skills consecutive numbers from 1 to max{A_i}? this is, A_(i+1) = A_i + 1?
Read the statement carefully.
M · 11-07 20:46 (min 226) · Private
Can I turn the string = DU^kD into DDU^K
Read the statement carefully.
M · 11-07 20:55 (min 235) · Private
A descriçao fala que é possível substituir DU^kD (k >= 1) por U^kDD. Não deveria ser U^kD^kD?
Read the statement carefully.
D · 11-07 20:57 (min 237) · Private
La corrección del ejercicio dice "TIme Limit Exeeded" pero al testear con grandes volumenes de números en nuestra máquina lo soluciona al instante. Que puede estar sucediendo? Puede ser un error de conexión?
I do not think so.
J · 11-07 20:59 (min 239) · Private
pairwise??? what does it mean in Spanish?
Please see a general clarification that was sent about two hours ago. Nevermind, I will copy here for your convenience:
We have received a number of clarification requests asking about the meaning of the word "pairwise".
To address these requests, we would like to provide the following definition:
pairwise (adverb / adjective)
Definition: Involving, relating to, or comparing two things at a time, especially when considering all possible pairs within a group.
----
Please note that bringing a dictionary is permitted under the contest rules. However, we cannot guarantee that questions of this nature will be answered during other stages of ICPC competitions.
Clarifications are intended to resolve potential ambiguities or errors in the problem statement, or to address issues with the judging system. They are not intended to provide general explanations of terminology.
J · 11-07 21:20 (min 260) · Private
ok
No response.
J · 11-07 21:26 (min 266) · Private
Los cortes tienen el proposito de que las 4 partes generadas sean lo mas simetrico posible?
Please reread the statement.
M · 11-07 21:46 (min 286) · Private
esta bien el M?
The statement? Yes.
B · 11-07 21:48 (min 288) · Private
Solution to B is correct. We've tested if for many cases. Please review
No response.
J · 11-07 21:53 (min 293) · Private
Se puede considerar un solo chocolate como un rectangulo? en el caso de cortar en (1, 2)
Please rephrase your question, I do not understand it. If you are asking whether a square is a rectangle, the answer is yes.
General · 11-07 21:53 (min 293) · Private
holiiiiiiiiiiiiiiiiiiiiiiiiii, nos fue super mal unuuuuu
But surely you had some fun. Practice more and come back next year.
MOJ
contest report