#include #include using namespace std; using namespace atcoder; typedef long long ll; typedef long double ld; #define REP(i, n) for (int i = 0; i < (n); ++i) #define REPR(i, n) for (int i = n - 1; i >= 0; --i) #define FOR(i, m, n) for (int i = m; i < n; ++i) #define FORR(i, m, n) for (int i = m; i >= n; --i) #define ALL(v) (v).begin(),(v).end() #define ALLR(v) (v).rbegin(),(v).rend() #define fi first #define se second #define PB push_back #define EB emplace_back template using PQ = priority_queue; template using QP = priority_queue,greater>; templatevoid debug(const T &v,ll h,ll w){for(ll i=0;ivoid debug(const T &v,ll n){for(ll i=0;ivoid debug(const vector&v){debug(v,v.size());} templatevoid debug(const vector>&v){for(auto &vv:v)debug(vv,vv.size());} templatevoid debug(stack st){while(!st.empty()){cout<void debug(queue st){while(!st.empty()){cout<void debug(deque st){while(!st.empty()){cout<void debug(PQ st){while(!st.empty()){cout<void debug(QP st){while(!st.empty()){cout<void debug(const set&v){for(auto z:v)cout<void debug(const multiset&v){for(auto z:v)cout<void debug(const array &a){for(auto z:a)cout<void debug(const map&v){for(auto z:v)cout<<"["<bool chmax(T &a, const T &b) { if (abool chmin(T &a, const T &b) { if (b> a(4,vector(4)); REP(i,4) REP(j,4) cin >> a[i][j]; int sx=-1,sy=-1; vector> b(4,vector(4)); REP(i,4) REP(j,4) b[i][j]=i*4+j+1; b[3][3]=0; REP(i,4) REP(j,4) if(a[i][j]==0) sx=i,sy=j; auto f=[&](auto &&f,vector> c,int x,int y,int z=0)->bool{ if(c==b) return true; // cerr << z << endl; // debug(c); bool res=false; REP(i,4){ int nx=x+dx[i],ny=y+dy[i]; if(nx<0||nx>=4||ny<0||ny>=4) continue; if(z&(1<<(c[nx][ny]))) continue; swap(c[x][y],c[nx][ny]); res|=f(f,c,nx,ny,(z|(1<