#include <bits/stdc++.h> using namespace std; int main(){ ios_base::sync_with_stdio(false); cin.tie(nullptr); int test; cin >> test; while(test--){ int N; cin >> N; vector<int> A(N); for(auto &a : A) cin >> a; bool zero = false,two = false; for(int i=0; i<N; i++){ if(A.at(i) == 0) zero = true; if(A.at(i) == 2) two = true; } if(!zero || !two){cout << "No" << endl; continue;} int before = -1; bool yes = true; for(int i=0; i<2*N; i++){ int pos = i%N; if(A.at(pos) == 1) continue; if(A.at(pos) == 0 && before == 0) yes = false; if(A.at(pos) == 2 && before == 2) yes = false; before = A.at(pos); } if(yes) cout << "Yes" << endl; else cout << "No" << endl; } }