#baseball
N=int(input())
s=[input() for i in range(N)]
w=[0]*N
for i in range(N):
    cw=0
    cg=0
    for j in range(N):
        if s[i][j]=="o":
            cw+=1
        elif s[i][j]=="-":
            cg+=1
    if i==0:
        cw+=cg
    w[i]=cw
p=1
for i in range(1,N):
    if w[i]>w[0]:
        p+=1
print(p)