Error: array bound is not an integer constant before ‘]’ token

#include<iostream>
#include<cstdio>
using namespace std;
const int N=1010;//（Just because this place forgot to write const ！！！！）
int a[N][N],s[N][N];
int main()
{···}

==Just because I forgot to write const!!!! ==And then they report mistakes everywhere, “s’ /” a ‘was not declared in this scope?
children, do you also think it’s very emmm