#include #define INIT std::ios::sync_with_stdio(false);std::cin.tie(0); // VAR(int, x); #define VAR(type, ...)type __VA_ARGS__;Scan(__VA_ARGS__); template void Scan(T& t){std::cin >> t;} templatevoid Scan(First& first,Rest&...rest){std::cin>>first;Scan(rest...);} #define OUT(d) std::cout<<(d); #define FOUT(n, d) std::cout< c(n);for(auto& i:c)std::cin>>i; #define MAT(type, c, m, n) std::vector> c(m, std::vector(n));for(auto& r:c)for(auto& i:r)std::cin>>i; #define ALL(a) (a).begin(),(a).end() #define FOR(i, a, b) for(int i=(a);i<(b);++i) #define RFOR(i, a, b) for(int i=(b)-1;i>=(a);--i) #define REP(i, n) for(int i=0;i=0;--i) #define PAIR std::pair #define IN(a0, y, a1, b0, x, b1) (a0<=y && y(end-start).count();std::cerr<<"[Time:"<> base(4, std::vector(4)); REP(i, 4)REP(j, 4){ base[i][j] = i*4+j+1; } base[3][3] = 0; std::vector> t(4, std::vector(4, false)); int x = 3, y = 3; bool conti; while(true){ conti = false; if(a[y][x] == 0) break; if(y!=0 && base[y-1][x] == a[y][x]){ if(t[y-1][x]) break; std::swap(base[y-1][x], base[y][x]); t[y][x] = true; --y; conti = true; } if(y!=3 && base[y+1][x] == a[y][x]){ if(t[y+1][x]) break; std::swap(base[y+1][x], base[y][x]); t[y][x] = true; ++y; conti = true; } if(x!=0 && base[y][x-1] == a[y][x]){ if(t[y][x-1]) break; std::swap(base[y][x-1], base[y][x]); t[y][x] = true; --x; conti = true; } if(x!=3 && base[y][x+1] == a[y][x]){ if(t[y][x+1]) break; std::swap(base[y][x+1], base[y][x]); t[y][x] = true; ++x; conti = true; } if(!conti) break; } OUT(a==base?"Yes":"No")BR; } ())); return 0; }