#include using namespace std; vector> t = {{1,2,3,4},{5,6,7,8},{9,10,11,12},{13,14,15,0}}; const int dx[] = {-1, 0, 1, 0}; const int dy[] = {0, -1, 0, 1}; int main(){ vector> a(4,vector(4)); int x,y; for(int i = 0; i < 4; i++){ for(int j = 0; j < 4; j++){ cin >> a[i][j]; if(a[i][j] == 0) x = i, y = j; } } bool flag = true; while(flag){ flag = false; for(int i = 0; i < 4; i++){ int xx = x + dx[i]; int yy = y + dy[i]; if(xx < 0 or xx >= 4 or yy < 0 or yy >= 4) continue; if(a[xx][yy] == t[x][y]){ swap(a[xx][yy],a[x][y]); x = xx, y = yy; flag = true; break; } } } cout << (t == a ? "Yes" : "No") << endl; return 0; }