Language: C++

# 要求されるカルテットを条件ごとに求めて、その後要求されるペアを求めているが２つWA

from collections import Counter
w = ''
H,W = map(int,input().split())
for _ in range(H):
    w += input()
freq = Counter(list(w))
#print(freq)

quartet = 0
pair = 0
if H%2 == 0 and W%2 == 0:
    for v in freq.values():
        if v%4 != 0:
            print('No')
            exit()
    print('Yes')
    exit()

elif H%2 == 0 and W%2 != 0:

    for k,v in freq.items():
        #if freq[k] %4 ==0:
        if freq[k]>=4:
            quartet += v//4
            freq[k] -= 4*(v//4)
    if quartet < (H//2)*(W//2): #slash
        print('No')
        exit()
    else:
        pair += 2*(quartet-(H//2)*(W//2)) # 余分なカルテットをペアに分解

    for k,v in freq.items():
        if freq[k] >= 2:
            pair += v//2
            freq[k] -= 2*(v//2)
    if pair != H//2:
        print('No')
        exit()
    else:
        print('Yes')
        exit()


elif H%2 != 0 and W%2 == 0:
    for k, v in freq.items():
        #if freq[k] % 4 == 0:
        if freq[k] >= 4:
            quartet += v // 4
            freq[k] -= 4 * (v // 4)
    if quartet < (H // 2) * (W // 2):
        print('No')
        exit()
    else:
        pair += 2 * (quartet - (H // 2) * (W // 2))  # 余分なカルテットをペアに分解

    for k, v in freq.items():
        if freq[k] >= 2:
            pair += v // 2
            freq[k] -= 2 * (v // 2)
    if pair != W // 2:
        print('No')
        exit()
    else:
        print('Yes')
        exit()

else:
    for k, v in freq.items():
        if freq[k] >= 4:
            quartet += v // 4
            freq[k] -= 4 * (v // 4)
    if quartet < (H // 2) * (W // 2):
        print('No')
        exit()
    else:
        pair += 2 * (quartet - (H // 2) * (W // 2))  # 余分なカルテットをペアに分解

    for k, v in freq.items():
        #if freq[k] % 2 == 0:
        if freq[k] >=2:
            pair += v // 2
            freq[k] -= 2 * (v // 2)
    if pair != (W//2 + H//2):
        print('No')
        exit()
    else:
        print('Yes')
        exit()


Compiler output:
a.cc:1:3: error: extended character 、 is not valid in an identifier
    1 | # 要求されるカルテットを条件ごとに求めて、その後要求されるペアを求めているが２つWA
      |   ^
a.cc:1:3: error: invalid preprocessing directive #\U00008981\U00006c42\U00003055\U0000308c\U0000308b\U000030ab\U000030eb\U000030c6\U000030c3\U000030c8\U00003092\U00006761\U00004ef6\U00003054\U00003068\U0000306b\U00006c42\U00003081\U00003066\U00003001\U0000305d\U0000306e\U00005f8c\U00008981\U00006c42\U00003055\U0000308c\U0000308b\U000030da\U000030a2\U00003092\U00006c42\U00003081\U00003066\U00003044\U0000308b\U0000304c\U0000ff12\U00003064WA
    1 | # 要求されるカルテットを条件ごとに求めて、その後要求されるペアを求めているが２つWA
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:4:5: error: empty character constant
    4 | w = ''
      |     ^~
a.cc:9:2: error: invalid preprocessing directive #print
    9 | #print(freq)
      |  ^~~~~
a.cc:16:19: warning: multi-character character constant [-Wmultichar]
   16 |             print('No')
      |                   ^~~~
a.cc:18:11: warning: multi-character character constant [-Wmultichar]
   18 |     print('Yes')
      |           ^~~~~
a.cc:24:17: error: token "[" is not valid in preprocessor expressions
   24 |         #if freq[k] %4 ==0:
      |                 ^
a.cc:81: error: unterminated #if
   81 |         #if freq[k] % 2 == 0:
a.cc:48: error: unterminated #if
   48 |         #if freq[k] % 4 == 0:
a.cc:24: error: unterminated #if
   24 |         #if freq[k] %4 ==0:
a.cc:3:1: error: 'from' does not name a type
    3 | from collections import Counter
      | ^~~~