求助！第二个点TLE了

r,c = map(int,input().split())
if r == 1 and c == 1:
    print(1)
    exit(0)
all = {}
length = []
u = 1
for i in range(r):
    list1 = input().split()
    for j in range(c):
        all[(i+1,j+1)] = int(list1[j])
special = 0
if c == 1:
    special = 1
    for i in range(r):
        all[(i+1,2)] = 0
    c += 1
if r == 1:
    special = 1
    for i in range(c):
        all[(2,i+1)] = 0
    r += 1
for i in range(1,r+1):
    for j in range(1,c+1):
        temp = {(i,j):0}
        for x in range(r*c):
            now = {}
            for y in temp:
                a,b = y[0],y[1]
                if a == 1 and b == 1:
                    if all[(1,1)] > all[(1,2)]:
                        now[(1,2)] = 0
                    if all[(1,1)] > all[(2,1)]:
                        now[(2,1)] = 0
                elif a == 1 and b == c:
                    if all[(1,c)] > all[(1,c-1)]:
                        now[(1,c-1)] = 0
                    if all[(1,c)] > all[(2,c)]:
                        now[(2,c)] = 0
                elif a == r and b == c:
                    if all[(r,c)] > all[(r,c-1)]:
                        now[(r,c-1)] = 0
                    if all[(r,c)] > all[(r-1,c)]:
                        now[(r-1,c)] = 0
                elif a == r and b == 1:
                    if all[(r,1)] > all[(r,2)]:
                        now[(r,2)] = 0
                    if all[(r,1)] > all[(r-1,1)]:
                        now[(r-1,1)] = 0
                elif a == 1:
                    if all[(a,b)] > all[(a+1,b)]:
                        now[(a+1,b)] = 0
                    if all[(a,b)] > all[(a,b+1)]:
                        now[(a,b+1)] = 0
                    if all[(a,b)] > all[(a,b-1)]:
                        now[(a,b-1)] = 0
                elif a == r:
                    if all[(a,b)] > all[(a,b+1)]:
                        now[(a,b+1)] = 0
                    if all[(a,b)] > all[(a-1,b)]:
                        now[(a-1,b)] = 0
                    if all[(a,b)] > all[(a,b-1)]:
                        now[(a,b-1)] = 0
                elif b == 1:
                    if all[(a,b)] > all[(a+1,b)]:
                        now[(a+1,b)] = 0
                    if all[(a,b)] > all[(a,b+1)]:
                        now[(a,b+1)] = 0
                    if all[(a,b)] > all[(a-1,b)]:
                        now[(a-1,b)] = 0
                elif b == c:
                    if all[(a,b)] > all[(a+1,b)]:
                        now[(a+1,b)] = 0
                    if all[(a,b)] > all[(a-1,b)]:
                        now[(a-1,b)] = 0
                    if all[(a,b)] > all[(a,b-1)]:
                        now[(a,b-1)] = 0
                else:
                    if all[(a,b)] > all[(a+1,b)]:
                        now[(a+1,b)] = 0
                    if all[(a,b)] > all[(a,b+1)]:
                        now[(a,b+1)] = 0
                    if all[(a,b)] > all[(a-1,b)]:
                        now[(a-1,b)] = 0
                    if all[(a,b)] > all[(a,b-1)]:
                        now[(a,b-1)] = 0
            temp = now
            if temp == {}:
                break
        if u < x+1:
            u = x+1
if special == 1:
    u -= 1
print(u)