Spiraali

n,t = [int(x) for x in input().split()]
sijainnit = []
for i in range(t):
    y, x = [int(x) for x in input().split()]
    sijainnit.append((y,x))
for y,x in sijainnit:
    #Alaspäin
    if x <= n // 2 and (x - 1) <= y < (n - x + 1):
        m = (x-1) * 4 + 1
        x1 = m // 4 + 1
        if m == 1:
            y1 = 1
        else:
            y1 = m // 4
        if m == 1:
            z1 = 1
        else:
            z1 = (m - 1 ) * n - (1 + 2 * (((m // 2 - 1) * (1 + (m // 2 - 1)) // 2)) + (m//2)) + 1
        z = z1 + (y - y1)
    #Ylöspäin
    elif x >= n // 2 and (n - x + 1) < y <= (x):
        m = 2 + (n-x) * 4 + 1
        x1 = n - m // 4
        y1 = n - m // 4
        z1 = (m - 1 ) * n - (1 + 2 * (((m // 2 - 1) * (1 + (m // 2 - 1)) // 2)) + (m//2)) + 1
        z = z1 + (y1 - y)
    #Vasemmalle
    elif y <= n // 2 and (y) < x <= (n - y + 1):
        m = 3 + (y-1) * 4 + 1
        y1 = m // 4
        x1 = n - m // 4 + 1
        z1 = (m - 1 ) * n - (1 + 2 * (((m // 2 - 1) * (1 + (m // 2 - 1)) // 2))) + 1
        z = z1 + (x1 - x)
    #Oikealle
    elif y >= n // 2 and (n - y + 1) <= x < y:
        m = 1 + (n-y) * 4 + 1
        y1 = n - m // 4
        x1 = m // 4 + 1
        z1 = (m - 1 ) * n - (1 + 2 * (((m // 2 - 1) * (1 + (m // 2 - 1)) // 2))) + 1
        z = z1 + (x - x1)
    print(z)

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: ACCEPTED