func_code_string: #include <bits/stdc++.h>   #define ll long long   #define real long double   #define fr(i,l,n) for(ll i=l;i<n;i++)   #define br cout<<  n    #define al(fu) (fu).begin(), (fu).end()   #define prl(c) cout<<(c)<<  n    #define prv(v) {fr(qz,0,v.size()) cout<<(v)[qz]<<   ; br;}   #define alr(fu) (fu).rbegin(), (fu).rend()   #define mod 1000000007LL   #define mod1 998244353LL   #define nfi 1000000000000000013LL   #define skoree ios::sync_with_stdio(0); cin.tie(0)   #define danet(b) cout<<(b? YES : NO )   #define Danet(b) cout<<(b? Yes : No )   using namespace std;      char aq(char a){       if(a== 0 ) return  1 ;       else return  0 ;   }      int main(){       skoree;       ll o0o;       cin>>o0o;       while(o0o--){           ll n;           cin>>n;           vector<string> a(n),b(n);           fr(i,0,n) cin>>a[i];           fr(i,0,n) cin>>b[i];           fr(i,0,n) if(a[0][i]!=b[0][i]){               fr(j,0,n) a[j][i]=aq(a[j][i]);           }           bool bb=1;           fr(i,1,n) if(a[i]!=b[i]){               fr(j,0,n) a[i][j]=aq(a[i][j]);               if(a[i]!=b[i]) bb=0;           }           danet(bb);br;       }       return 0;   }   /*   */   