Säähavainnot

#include <bits/stdc++.h>

using namespace std;

using Day = array<double, 24>;

istream& operator>>(istream& in, Day& day)
{
	for (int i = 0; i < 24; ++i)
		cin >> day[i];
	return in;
}

void solve(Day& day, vector<optional<double>>& answer)
{
	if (abs(day[23] - day[0]) > 2.0)
		return;

	const double threshold = 0.8;
	answer[0] = day[23] + (day[23] - day[22]) / 2;
	for (int i = 1; i < 7 && abs(day[i] - day[i - 1]) <= threshold; ++i)
		answer[i] = answer[i - 1].value() + day[i] - day[i - 1];

	if (abs(day[23] - day[0]) > threshold)
		return;
	for (int i = 8; i < 12; ++i)
		answer[i] = day[i];
}

int main()
{
	cin.tie(nullptr)->sync_with_stdio(false);

	int n = 0;
	cin >> n;

	vector<Day> days(n);
	for (int i = 0; i < n; ++i)
		cin >> days[i];

	for(int i = 0; i < n; ++i)
	{
		vector<optional<double>> answer(12);
		solve(days[i], answer);
		for (auto x : answer)
		{
			if (x)
				cout << x.value() << " ";
			else
				cout << "? ";
		}
		cout << "\n";
	}

	return 0;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED