Submission #8830136


Source Code Expand

import sys

input=sys.stdin.readline
p2D = lambda x: print(*x, sep="\n")
def MI(): return map(int, sys.stdin.readline().split())

def main():
    h, w = MI()
    s = [[c == "#" for c in input()[:-1]] for _ in range(h)]
    #if w == 2:
    #    s = [list(sc) for sc in zip(*s)]
    #    h, w = w, h
    # p2D(s)
    t = [[-1] * (w - 1) for _ in range(h - 1)]
    for i in range(h - 1):
        si = s[i]
        si1 = s[i + 1]
        t[i] = [1 - (sum(si[j:j + 2]) + sum(si1[j:j + 2])) % 2 for j in range(w - 1)]
    # p2D(t)
    # print()
    ti=t[0]
    for i in range(1, h - 1):
        ti1=ti
        ti=t[i]
        for j in range(w - 1):
            if ti[j]: ti[j] = ti1[j] + 1
    # p2D(t)
    ans = 0
    for i in range(h - 1):
        jtol = [0] * (w - 1)
        jtor = [0] * (w - 1)
        ti=t[i]
        # 高さ、位置の順
        stack = [[-1, 0]]
        for j in range(w - 1):
            tij=ti[j]
            while stack[-1][0] >= tij: stack.pop()
            jtol[j] = stack[-1][1]
            stack.append([tij, j + 1])

        stack = [[-1, w - 1]]
        for j in range(w - 2, -1, -1):
            tij=ti[j]
            while stack[-1][0] >= tij: stack.pop()
            jtor[j] = stack[-1][1]
            stack.append([tij, j])

        for j in range(w - 1):
            tmp = (jtor[j] - jtol[j] + 1) * (ti[j] + 1)
            if tmp > ans: ans = tmp
    print(max(ans,h,w))

main()

Submission Info

Submission Time
Task F - Flip and Rectangles
User mkawa2
Language PyPy3 (2.4.0)
Score 700
Code Size 1468 Byte
Status AC
Exec Time 1857 ms
Memory 133128 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 700 / 700
Status
AC × 3
AC × 40
Set Name Test Cases
Sample sample1.txt, sample2.txt, sample3.txt
All sample1.txt, sample2.txt, sample3.txt, 1.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 2.txt, 20.txt, 21.txt, 22.txt, 23.txt, 24.txt, 25.txt, 26.txt, 27.txt, 28.txt, 29.txt, 3.txt, 30.txt, 31.txt, 32.txt, 33.txt, 34.txt, 4.txt, 5.txt, 6.txt, 7.txt, 8.txt, 9.txt, sample1.txt, sample2.txt, sample3.txt
Case Name Status Exec Time Memory
1.txt AC 222 ms 43760 KB
10.txt AC 1812 ms 132872 KB
11.txt AC 981 ms 103260 KB
12.txt AC 1639 ms 129160 KB
13.txt AC 1666 ms 130824 KB
14.txt AC 1667 ms 131336 KB
15.txt AC 1670 ms 131976 KB
16.txt AC 1645 ms 131336 KB
17.txt AC 1662 ms 132104 KB
18.txt AC 1815 ms 132616 KB
19.txt AC 1710 ms 131848 KB
2.txt AC 194 ms 41584 KB
20.txt AC 1709 ms 131592 KB
21.txt AC 1726 ms 132104 KB
22.txt AC 1745 ms 132232 KB
23.txt AC 1785 ms 131720 KB
24.txt AC 1634 ms 129288 KB
25.txt AC 1607 ms 129288 KB
26.txt AC 1857 ms 133128 KB
27.txt AC 1771 ms 132744 KB
28.txt AC 1762 ms 133000 KB
29.txt AC 1662 ms 130824 KB
3.txt AC 1808 ms 132488 KB
30.txt AC 1650 ms 130824 KB
31.txt AC 1651 ms 130696 KB
32.txt AC 1656 ms 130696 KB
33.txt AC 1651 ms 130696 KB
34.txt AC 1678 ms 131080 KB
4.txt AC 1765 ms 132360 KB
5.txt AC 233 ms 45148 KB
6.txt AC 189 ms 41072 KB
7.txt AC 1822 ms 132872 KB
8.txt AC 1823 ms 132872 KB
9.txt AC 1774 ms 131720 KB
sample1.txt AC 162 ms 38356 KB
sample2.txt AC 161 ms 38256 KB
sample3.txt AC 161 ms 38256 KB