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)