Spiraali

#include <bits/stdc++.h>

using namespace std;

typedef long long int ll;

ll n,t;

int main()
{
    cin>>n>>t;
    ll y,x;
    for(int i=0;i<t;i++)
    {
        cin>>y>>x;
        ll round = min(min(x, n-x+1),min(y, n-y+1))-1;
        ll start = n*n - (n-round*2)*(n-round*2) + 1;
        ll progress = 0;
        if(x>round+1)
        {
            progress += n-round*2-1;
            if(y<n-round)
            {
                progress += n-round*2-1;
                if(x<n-round)
                {
                    progress += n-round*2-1;
                    progress += n-round-x;
                }
                else
                {
                    progress += n-round-y;
                }
            }
            else
            {
                progress += x-(round+1);
            }
        }
        else
        {
            progress += y-(round+1);
        }
        cout<<start+progress<<'\n';
    }
}

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: ACCEPTED