Niitty

import sys
n = sys.stdin.readline()
n = int(n[0:len(n)-1])
#n=15
rivit = []
letters = []
contents = []
#t="cebdaaaadcdebcb ceabdeceddbbdbe eceeedabecacdac ecadabebddacbcd dbebbecbeedadea eabedcecdbcdddb cbcddccacedcdba caddddaddbcbbec baabddbebcdeeae dadacacacaeeccc cbcceacdcbccdbd baecaaadaebcdec eaadcbdbcebecac bdeecdbabbebecb adaedabccdedadc"
#rivit = t.split()
rivit = ["".join(line[0:len(line)-1]) for line in sys.stdin]
 
#for i in range(0, n):
#    r = sys.stdin.readline()
#    r = r[0:len(r)-1]
#    rivit.append(r)
letters = "".join(set("".join(rivit)))
def getplant(x, y, map):
    return map[y][x]
realx = n
realy = n
realz = n
duplicates = []
def find(rows, ax, bx):
    xdiff = ax[0]
    ydiff = ax[1]
    xend = bx[0]
    yend = bx[1]
 
    if abs(xdiff-xend) * abs(ydiff*yend) == len(letters):
        return 0
 
    #print(rows)
    if len(rows) <= 1 and len(rows[0]) <= 0:
        return 0
    x = len(rows[0]) - 1
    y = len(rows) - 1
    thisamnt = 0
 
    if len(rows) >= 2 and (abs(xdiff-xend) * (abs(ydiff-yend)-1) >= len(letters)):
        #ylhäältä
        jalkeen = rows[1:len(rows)]
        cut = True
        for i in range(0, x + 1):    
            if getplant(i, 0, rows) not in "".join(jalkeen):
                cut = False
                break
        if cut:
            v = jalkeen.copy()
            v.append(f'{xdiff}:{ydiff+1};{xend}:{yend}')
            if v not in duplicates:
                #print(f'1Ensin {rows} -> {v}')
                thisamnt += 1
                duplicates.append(v)
                thisamnt += find(jalkeen, [xdiff, ydiff+1], [xend, yend])
 
        if not (len(rows) >= 2 or cut) == False:
        #alhaalta
            jalkeen = rows[0:len(rows)-1]
            cut = True
            for i in range(0, x + 1):
                #print(rows, getplant(i, 0, rows), jalkeen)
                if getplant(i, len(rows) - 1, rows) not in "".join(jalkeen):
                    cut = False
                    break
            if cut:
                v = jalkeen.copy()
                v.append(f'{xdiff}:{ydiff};{xend}:{yend-1}')
                if v not in duplicates:
                    #print(f'2Ensin {rows} -> {v}')
                    thisamnt += 1
                    duplicates.append(v)
                    thisamnt += find(jalkeen, [xdiff, ydiff], [xend, yend-1])
    
    
    if len(rows[0]) >= 2 and ((abs(xdiff-xend)-1) * abs(ydiff-yend) >= len(letters)):
        #oikea
        jalkeen = []
        for x in rows:
            jalkeen.append(x[0:len(x) - 1])
        cut = True
        for i in range(0, y + 1):
            if getplant(len(rows[0]) - 1, i, rows) not in "".join(jalkeen):
                cut = False
                break
        if cut:
            v = jalkeen.copy()
            v.append(f'{xdiff}:{ydiff};{xend-1}:{yend}')
            if v not in duplicates:
                #print(f'3Ensin {rows} -> {v}')
                thisamnt += 1
                duplicates.append(v)
                thisamnt += find(jalkeen, [xdiff, ydiff], [xend-1, yend])
    
        if not (len(rows[0]) >= 2 or cut) == False:
        #vasen
            jalkeen = []
            for x in rows:
                jalkeen.append(x[1:len(x)])
            cut = True
            for i in range(0, y + 1):
                #print(rows, rows[i][0], y, jalkeen)
                if getplant(0, i, rows) not in "".join(jalkeen):
                    cut = False
                    break
            if cut:
                v = jalkeen.copy()
                v.append(f'{xdiff+1}:{ydiff};{xend}:{yend}')
                if v not in duplicates:
                    #print(f'4Ensin {rows} -> {v}')
                    thisamnt += 1
                    duplicates.append(v)
                    thisamnt += find(jalkeen, [xdiff+1, ydiff], [xend, yend])
 
    return thisamnt
 
 
maara = find(rivit, [0, 0], [realx, realy]) + 1
#for i in range(0, len(duplicates)):
#    for z in range(0, len(letters)):
#        if letters[z] not in "".join(duplicates[i]):
#            print("SOS hätätilanne")
print(maara)

Test 1

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 2

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 3

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 4

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 5

Group: 1, 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 6

Group: 2, 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 7

Group: 2, 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 8

Group: 2, 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 9

Group: 2, 3, 4, 5, 6

Verdict: ACCEPTED

Test 10

Group: 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 11

Group: 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 12

Group: 3, 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 13

Group: 3, 4, 5, 6

Verdict: ACCEPTED

Test 14

Group: 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 15

Group: 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 16

Group: 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 17

Group: 4, 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 18

Group: 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 19

Group: 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 20

Group: 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 21

Group: 5, 6

Verdict: TIME LIMIT EXCEEDED

Test 22

Group: 6

Verdict: TIME LIMIT EXCEEDED

Test 23

Group: 6

Verdict: TIME LIMIT EXCEEDED

Test 24

Group: 6

Verdict: TIME LIMIT EXCEEDED

Test 25

Group: 6

Verdict: TIME LIMIT EXCEEDED