#include #include #include #include using namespace std; using ll = long long; struct pos { int x, y; pos operator+(pos &rhs) const { return {x + rhs.x, y + rhs.y}; } pos &operator+=(const pos &rhs) { x += rhs.x, y += rhs.y; return *this; } bool operator==(pos &rhs) const { return x == rhs.x && y == rhs.y; } }; const vector moves{{1, 0}, {-1, 0}, {0, 1}, {0, -1}}; const int w = 4, h = 4; bool inRange(pos p) { return 0 <= p.x && p.x < h && 0 <= p.y && p.y < w; } int main() { vector> ok(4, vector(4, true)); pos emp; for (int i = 0; i < 4; i++) { for (int j = 0; j < 4; j++) { int x; cin >> x; if (x == 0) { emp = {i, j}; continue; } x--; int move = abs(i - (x / 4)) + abs(j - (x % 4)); if (move > 1) { cout << "No" << endl; return 0; } if (move == 1)ok[i][j] = false; } } queue que; que.push(emp); while (!que.empty()) { pos here = que.front(); que.pop(); for (auto move:moves) { pos next = here + move; if (inRange(next) && !ok[next.x][next.y]) { ok[next.x][next.y] = true; que.push(next); } } } bool ret = true; for (int i = 0; i < 4; i++) { for (int j = 0; j < 4; j++) { if (!ok[i][j])ret = false; } } cout << (ret ? "Yes" : "No") << endl; return 0; }