CSES - Datatähti 2022 alku - Results
Submission details
Task:Spiraali (Spiral)
Sender:tonero
Submission time:2021-10-05 19:04:14
Language:C++17
Status:READY
Result:100
Feedback
groupverdictscore
#1ACCEPTED15
#2ACCEPTED20
#3ACCEPTED65
Test results
testverdicttimegroup
#1ACCEPTED0.01 s1details
#2ACCEPTED0.01 s2details
#3ACCEPTED0.01 s3details

Code

#include <bits/stdc++.h>

using namespace std;
#define ll long long

int getDist(int x, int y, int n){
    return min(min(x-1, n - x), min(y-1, n - y));
}

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

    for (int i = 0; i < t; i++)
    {
        ll currnum = 0;
        int iterations = 0;
        int xcoord = 1;
        int ycoord = 0;
        int n2 = n;
        int x, y;
        cin >> y >> x;

        if (x == 1)
        {
            std::cout << y;
            std::cout << '\n';
            continue;
        }
        else if (x == n / 2 + 1 && y == n / 2)
        {
            ll n3 = (ll)n2;
            std::cout << n3 * n3;
            std::cout << '\n';
            continue;
        }
        
        ll dist = getDist(x,y,n);

        ll n3 = (ll) n;
        ll sum = ((dist)*(n3+(n3-(dist)*2)))/2;
        currnum = sum*4;
        n2 = n-dist*2;
        iterations = dist;

        xcoord += iterations;
        ycoord += iterations;

        int toadd;

        if (xcoord == x && ycoord == y)
        {
        }
        else if (xcoord == x && y > ycoord)
        {
            toadd = y - ycoord;
            ycoord += toadd;
            currnum += toadd;
        }else{
            int maxadd = n2;
            ycoord += maxadd;
            currnum += maxadd;
            if(ycoord == y){
                toadd = x-xcoord;
                xcoord += toadd;
                currnum += toadd;
            }else{
                maxadd--;
                xcoord += maxadd;
                currnum += maxadd;
                if(xcoord == x){
                    toadd = ycoord-y;
                    //ycoord -= toadd;
                    currnum += toadd;
                }else{
                    //ycoord += maxadd;
                    currnum += maxadd;
                    toadd = xcoord-x;
                    //xcoord -= toadd;
                    currnum += toadd;
                }
            }
        }
        

        std::cout << currnum;
        std::cout << '\n';
    }

    flush(std::cout);
}

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: ACCEPTED

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

correct output
571375684522141210
967321186816598569
762879105851175000
370065046779516790
936897883750373771
...

user output
571375684522141210
967321186816598569
762879105851175000
370065046779516790
936897883750373771
...