#include using namespace std; #define F first #define S second #define R cin>> #define ll long long #define ln cout<<'\n' #define in(a) insert(a) #define pb(a) push_back(a) #define pd(a) printf("%.10f\n",a) #define mem(a) memset(a,0,sizeof(a)) #define all(c) (c).begin(),(c).end() #define iter(c) __typeof((c).begin()) #define rrep(i,n) for(ll i=(ll)(n)-1;i>=0;i--) #define REP(i,m,n) for(ll i=(ll)(m);i<(ll)(n);i++) #define rep(i,n) REP(i,0,n) #define tr(it,c) for(iter(c) it=(c).begin();it!=(c).end();it++) ll check(ll n,ll m,ll x,ll y){return x>=0&&x=0&&yvoid pr(const A &a,const B&...b){cout<void PR(A a,ll n){rep(i,n)cout<<(i?" ":"")< P; void Main() { ll n,m; cin >> n >> m; ll a[n][m]; rep(i,n)rep(j,m) cin >> a[i][j]; ll dp[n][m][2]; mem(dp); dp[0][0][0]=a[0][0]; rep(i,n+m-1) { ll x=max(0LL,i-m+1),y=min(m-1,i); while(check(n,m,x,y)) { REP(k,1,3) { ll xx=x+dx[k],yy=y+dy[k]; if(!check(n,m,xx,yy)) continue; if(a[xx][yy]