45 lines
706 B
C++
45 lines
706 B
C++
#include <bits/stdc++.h>
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using namespace std;
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#define all(x) (x).begin(), (x).end()
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#define sz(x) static_cast<int>((x).size())
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#define FOR(x) for (int i = 0; i < (x).size(); ++i)
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#ifdef LOCAL
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#define dbg(x) cerr << #x << " = " << (x) << '\n'
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#else
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#define dbg(x)
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#endif
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void solve() {
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int n;
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cin >> n;
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vector<int> notes(n, 0);
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for (auto &x : notes)
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cin >> x;
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for (int i = 1; i < notes.size(); ++i) {
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auto diff = abs(notes[i] - notes[i - 1]);
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if (!(diff == 5 || diff == 7)) {
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cout << "NO\n";
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return;
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}
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}
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cout << "YES\n";
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}
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int main() {
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ios::sync_with_stdio(false);
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cin.tie(nullptr);
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int t;
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cin >> t;
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while (t--) {
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solve();
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}
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return 0;
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}
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