#Медленный способ
file = open('6A.txt')
A = list(map(int, file.readlines()))
n = A[0]
A = A[1:]
count = 0
for i in range(n):
    for j in range(i + 1, n):
        if (A[i] + A[j]) % 131 == 0:
            count += 1
print(count)

#Статический способ
file = open('6B.txt')
A = list(map(int, file.readlines()))
n = A[0]
A = A[1:]
k = [0] * 131
for i in range(n):
    ost = A[i] % 131
    k[ost] += 1
count = k[0] * (k[0] - 1) // 2
for i in range(1, 65):
    count += k[i] * k[131 - i]
print(count)


#Динамичсекий способ
file = open('6B.txt')
A = list(map(int, file.readlines()))
n = A[0]
A = A[1:]
k = [0] * 131
count = 0
for i in range(n):
    ost = (131 - A[i] % 131) % 131
    count += k[ost]
    k[A[i]%131] += 1
print(count)