n = int(input())
ans = 1
mx = 0
l = [[*map(int, input().split())] for i in range(n)]
for i in range(n):
s = set()
for j in range(n):
if i == j:
continue
for k in range(5):
if l[i][k] == l[j][k]:
s.add(j)
if len(s) > mx:
mx = len(s)
ans = i + 1
print(ans)