문제
풀이
def solve():
m, n = map(int, input().split())
v = [list(map(int, input().split())) for _ in range(n)]
a = [1] * m
for i in range(n):
for j in range(m):
a[j] *= v[i][j]
ans = 0
for i in range(m):
if a[i] >= a[ans]:
ans = i
print(ans + 1)
t = int(input())
for _ in range(t):
solve()