Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2) Editorial

#	User	Rating
1	jiangly	3810
2	Benq	3676
3	Kevin114514	3655
4	maroonrk	3463
5	strapple	3447
6	Um_nik	3387
7	heuristica	3322
8	turmax	3317
9	tourist	3307
10	jiangbowen	3291

#	User	Contrib.
1	Qingyu	156
2	nik_exists	150
2	maspy	150
4	Um_nik	141
5	Errichto	139
6	adamant	137
7	AmShZ	135
8	BledDest	132
9	maroonrk	131
10	qwexd	129

Thank you for your participation!

Problem A, B were authored by djm03178.

Problem C was authored by middle_man.

Problem D was authored by qwerasdfzxcl.

Problem E, F, G, H1, H2 were authored by ko_osaga.

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Code

#include <bits/stdc++.h>
using namespace std;

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	
	int t;
	cin >> t;
	while (t--)
	{
		int n;
		cin >> n;
		set<int> s;
		for (int i = 0; i < n; i++)
		{
			int x;
			cin >> x;
			s.insert(x);
		}
		cout << s.size() * 2 - 1 << '\n';
	}
}

2152B - Поймать Кругу

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Code

2152A - Увеличить или разбить

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Code

2152C - Удаление троек

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Code

2152D - Деление против сложения

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Code