```cpp
#include <bits/stdc++.h>
#define f(i,a,b) for(int i=a;i<=b;i++)
#define g(i,a,b) for(int i=a;i>=b;i--)
using namespace std;
int n,q,book[1001],len,code,flag;
int main(){
cin>>n>>q;
f(i,1,n) cin>>book[i];
sort(book+1,book+n+1);
f(i,1,q) {
cin>>len>>code;
f(j,1,n) {
if(book[j]%((int)pow(10,len))==code) {
printf("%d\n",book[j]);
flag=1;
break;
}
}
if(!flag) printf("%d\n",-1);
flag=0;
}
return 0;
}
```
by mooktian @ 2023-03-07 19:27:42