40分求助 求看

//芝士代码
#include<bits/stdc++.h> 
using namespace std;
int n,q; 
int reader[1001],book[1001],len[1001];
int main(){
	cin>>n>>q;
	for(int i=1;i<=n;i++){
		cin>>book[i];
	}
	for(int i=1;i<=q;i++){
		cin>>len[i]>>reader[i];
		int tmp = pow(10,len[i]);
		int minn = 1145141919;
		bool flag = false;
		for(int j=1;j<=n;j++){
			if(book[j]%tmp == reader[i] and book[j]<minn){
				minn = book[j];
				;
				flag = true;
			}
		}
		if(flag == 1145141919){
			cout<<"-1"<<endl;
		}else{
			cout<<minn<<endl;
		}
	}
    return 0;
}