#include int board[4][4] = {}; bool moved[4][4]; int ex; int ey; bool solve(int x, int y) { bool b; int bx = x; int by = y; int bex = ex; int bey = ey; /* std::cout << x << " " << y << std::endl; for(int i = 0; i < 4; ++i) { for(int j = 0; j < 4; ++j) { std::cout << board[i][j] << " "; } std::cout << std::endl; } std::cout << std::endl; */ if( not ( 0 <= x and x < 4 and 0 <= y and y < 4 ) ) { return false; } if( moved[x][y] ) { return false; } if( board[x][y] != 0 ) { std::swap(board[ex][ey], board[x][y]); moved[ex][ey] = true; ex = x; ey = y; } b = true; for(int i = 0; i < 4; ++i) { for(int j = 0; j < 4; ++j) { if( board[i][j] != i*4+j+1 && not ( i == 3 and j == 3 and board[i][j] == 0 ) ) { b = false; } } } if( b ) { return true; } if( solve(ex+1, ey) ) { ex = bex; ey = bey; moved[ex][ey] = false; std::swap(board[bex][bey], board[bx][by]); return true; } if( solve(ex-1, ey) ) { ex = bex; ey = bey; moved[ex][ey] = false; std::swap(board[bex][bey], board[bx][by]); return true; } if( solve(ex, ey+1) ) { ex = bex; ey = bey; moved[ex][ey] = false; std::swap(board[bex][bey], board[bx][by]); return true; } if( solve(ex, ey-1) ) { ex = bex; ey = bey; moved[ex][ey] = false; std::swap(board[bex][bey], board[bx][by]); return true; } ex = bex; ey = bey; moved[ex][ey] = false; std::swap(board[bex][bey], board[bx][by]); return false; } int main() { bool ans; for(int i = 0; i < 4; ++i) { for(int j = 0; j < 4; ++j) { moved[i][j] = false; } } for(int i = 0; i < 4; ++i) { for(int j = 0; j < 4; ++j) { std::cin >> board[i][j]; if( board[i][j] == 0 ) { ex = i; ey = j; } } } ans = solve(ex, ey); if( ans ) { std::cout << "Yes" << std::endl; } else { std::cout << "No" << std::endl; } return 0; }