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ABC225 C問題(python)

Last updated at Posted at 2022-02-08

#C - Calendar Validator

*留意事項
取り出した短形領域Bの各行は、
1,2,3,4,5,6,0 mod(7)の順番から
抜き出した並びになっている必要がある。

b=[]
l=True
k=0
n=0
s=0
N,M=map(int,input().split())
for _ in range(N):
    b=list(map(int,input().split()))
    if ((k!=0) and (b[0]!=(n+7))):
        l=False
        break
            
    n=b[0]
    for i in range(M-1):
        if s==1:
            l=False
            break
        if  (b[i+1]-b[i])!=1:
            l=False
            break
        if b[i]%7==0:
            s=s+1
    k=k+1
if l:
    print("Yes")
else:
    print("No")
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