CSES - DatatÃ¤hti 2022 alku - Results
 Task: Spiraali (Spiral) Sender: kpop Submission time: 2021-10-06 09:18:35 Language: C++11 Status: READY Result: 35
Feedback
groupverdictscore
#1ACCEPTED15
#2ACCEPTED20
#30
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1details
#2ACCEPTED0.01 s2details
#30.01 s3details

### Code

```#include <bits/stdc++.h>

using namespace std;

int n, t;

int main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);

cin >> n >> t;

int sz = floor(n/2);
int vi[1+sz];

vi[0]=0;

for (int i = 0; i < floor(n/2)-1; ++i) {
int last = vi[i];
vi[i+1] = last+((i*(-2)+n)*4)-4;
}

for (int i = 0; i < t; ++i) {
int x, y;
cin >> y >> x;

int up = y-1;
int bottom = n-y;
int left = x-1;
int right = n-x;

int dist = min(up, min(bottom, min(left, right)));
int nth = dist+1;

int result = vi[dist];
int side = n-(2*dist);

if (dist == left) {
cout << result+(y-nth)+1  << endl;
continue;
}

result += side;

if (dist == bottom) {
cout << result+(x-nth) << endl;
continue;
}

result += side-1;

if (dist == right) {
cout << result+(n-y-dist) << endl;
continue;
}

result += side-1;

if (dist == up) {
cout << result+(n-x)-dist << endl;
continue;
}
}
}```

### 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)