長テーブルのうなぎ屋 (Python)

""" 長テーブルのうなぎ屋 (paizaランク B 相当) https://p […]

""" 長テーブルのうなぎ屋 (paizaランク B 相当) https://p […]

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"""
(paiza B )
https://paiza.jp/works/mondai/skillcheck_sample/long-table?language_uid=python3
"""
def rl2val():
return map(
int,
input()
.split(" "))
# n: m:
n,m=rl2val()
table=[False for i in range(n)]
for i in range(m):
# a: b:
a,b=rl2val()
b-=1
for j in range(a):
if table[(b+j)%n] :break
else:
for j in range(a):
table[(b+j)%n]=True
print(table.count(True))
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