#35516: Python前綴和解
s11104220@school.saihs.edu.tw
(施同學)
學校
:
臺北市立松山高級工農職業學校
編號 : 221254
來源 : [223.137.72.55]
最後登入時間 ：
2024-12-11 13:02:15
from sys import stdin
def main():
n,m=map(int,stdin.readline().split())
s=[list(map(int,stdin.readline().split())) for _ in range(n)]
ns=[[0]*(m+1) for _ in range(n)]
for i in range(n):
count=0
for j in range(m):
count+=s[i][j]
ns[i][j+1]=count
ans=0
lan=[]
for i in range(n):
for j in range(m):
c=0
aij=s[i][j]
sk=i-aij
if sk<0:sk=0
ek=i+aij
if ek>=n:ek=n-1
for k in range(sk,ek+1):
sj=j-aij+abs(i-k)
if sj<0:sj=0
ej=j+aij-abs(i-k)
if ej>=m:ej=m-1
c+=ns[k][ej+1]-ns[k][sj]
if c%10==aij%10:
ans+=1
lan.append([i,j])
print(ans)
for i in range(ans):print(*lan[i])
main()
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