python 代码
n,q=input().split()
n=int(n)
q=int(q)
books=[]
for i in range(n):
books.append(int(input()))
requests=[]
for i in range(q):
length,code=input().split()
length=int(length)
code=int(code)
requests.append((length,code))
books.sort()
results=[]
for l,c in requests:
results.append(-1)
for b in books:
if (b-c)%10**l==0:
results.pop()
results.append(b)
break
for b in results:
print(b)


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