CSES - Datatähti 2022 alku - Results
Submission details
Task:Spiraali (Spiral)
Sender:Mixu_78
Submission time:2021-10-07 20:20:53
Language:C++17
Status:READY
Result:35
Feedback
groupverdictscore
#1ACCEPTED15
#2ACCEPTED20
#30
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1details
#2ACCEPTED0.01 s2details
#3--3details

Code

#include <iostream>
#include <vector>
#include <set>
#include <map>

using namespace std;

int left(int s, int nc, int l, int x2, int y2)
{
	int x1 = l + 1, y1 = x1;
	return (s)+((x2 - x1) + (y2 - y1));
};
int right(int s, int nc, int l, int x2, int y2)
{
	int x1 = l + 1, y1 = x1;
	return (s + nc) - ((x2 - x1) + (y2 - y1));
};
int getStart(int n, int l)
{
	int total = 0;
	for (int i = 0; i < l; ++i)
	{
		total += 4 * (n - (1 + i * 2));
	}
	return total + 1;
}

int main()
{
	std::ios_base::sync_with_stdio(0);
	std::cin.tie(0);
	int n, t;
	std::cin >> n >> t;

	for (int i = 0; i < t; i++)
	{
		int y, x;
		std::cin >> y >> x;
		int l = min(min(y - 1, x - 1), min(n - 1 - (y - 1), n - 1 - (x - 1)));
		int lSize = n - l * 2;
		int nc = 4 * (n - (1 + l * 2));
		int s = getStart(n, l);
		bool isRight = x - l == lSize || (y == l + 1 && x != l + 1);

		int res = isRight ? right(s, nc, l, x, y) : left(s, nc, l, x, y);
		printf("%i\n", res);
		//printf("(%d)%i %i: %i\n", isRight, y, x, res);
	}
}

Test details

Test 1

Group: 1

Verdict: ACCEPTED

input
10 100
1 1
1 2
1 3
1 4
...

correct output
1
36
35
34
33
...

user output
1
36
35
34
33
...

Test 2

Group: 2

Verdict: ACCEPTED

input
1000 1000
371 263
915 322
946 880
53 738
...

correct output
773533
312166
206053
200080
593922
...

user output
773533
312166
206053
200080
593922
...

Test 3

Group: 3

Verdict:

input
1000000000 1000
177757853 827347032
409613589 419171337
739269360 256524697
328695530 896842209
...

correct output
571375684522141210
967321186816598569
762879105851175000
370065046779516790
936897883750373771
...

user output
(empty)