#include using namespace std; #define _p(...) (void)printf(__VA_ARGS__) #define forr(x,arr) for(auto&& x:arr) #define _overload3(_1,_2,_3,name,...) name #define _rep2(i,n) _rep3(i,0,n) #define _rep3(i,a,b) for(int i=int(a);i=int(a);i--) #define rrep(...) _overload3(__VA_ARGS__,_rrep3,_rrep2,)(__VA_ARGS__) #define all(x) (x).begin(),(x).end() #define bit(n) (1LL<<(n)) #define sz(x) ((int)(x).size()) #define TEN(n) ((ll)(1e##n)) #define fst first #define snd second string DBG_DLM(int &i){return(i++==0?"":", ");} #define DBG_B(exp){int i=0;os<<"{";{exp;}os<<"}";return os;} templateostream&operator<<(ostream&os,vectorv); templateostream&operator<<(ostream&os,setv); templateostream&operator<<(ostream&os,queueq); templateostream&operator<<(ostream&os,priority_queueq); templateostream&operator<<(ostream&os,pairp); templateostream&operator<<(ostream&os,mapmp); templateostream&operator<<(ostream&os,unordered_mapmp); templatevoid DBG(ostream&os,TPL t){} templatevoid DBG(ostream&os,TPL t){os<<(I==0?"":", ")<(t);DBG(os,t);} templatevoid DBG(ostream&os,pairp,string delim){os<<"("<ostream&operator<<(ostream&os,tuplet){os<<"(";DBG<0,tuple,Ts...>(os,t);os<<")";return os;} templateostream&operator<<(ostream&os,pairp){DBG(os,p,", ");return os;} templateostream&operator<<(ostream&os,vectorv){DBG_B(forr(t,v){os<ostream&operator<<(ostream&os,sets){DBG_B(forr(t,s){os<ostream&operator<<(ostream&os,queueq){DBG_B(for(;q.size();q.pop()){os<ostream&operator<<(ostream&os,priority_queueq){DBG_B(for(;q.size();q.pop()){os<ostream&operator<<(ostream&os,mapm){DBG_B(forr(p,m){os<");});} templateostream&operator<<(ostream&os,unordered_mapm){DBG_B(forr(p,m){os<");});} #define DBG_OVERLOAD(_1,_2,_3,_4,_5,_6,macro_name,...)macro_name #define DBG_LINE(){char s[99];sprintf(s,"line:%3d | ",__LINE__);cerr<;using pll=pair;using pil=pair;using pli=pair; using vs=vector;using vvs=vector;using vvvs=vector; using vb=vector;using vvb=vector;using vvvb=vector; using vi=vector;using vvi=vector;using vvvi=vector; using vl=vector;using vvl=vector;using vvvl=vector; using vd=vector;using vvd=vector;using vvvd=vector; using vpii=vector;using vvpii=vector;using vvvpii=vector; templatebool amax(T&a,const T&b){return abool amin(T&a,const T&b){return a>b?a=b,1:0;} ll ri(){ll l;cin>>l;return l;} string rs(){string s;cin>>s;return s;} // R, D, L, U int DY[4] = {0, 1, 0, -1}; int DX[4] = {1, 0, -1, 0}; template bool inside(T y, T x, T h, T w) { return 0 <= y && y < h && 0 <= x && x < w; }; bool solve() { int n = ri(); int v = ri(); int ox = ri()-1; int oy = ri()-1; vvi M(n, vi(n)); rep(y, n) rep(x, n) M[y][x] = ri(); vvvi D(n, vvi(n, vi(2, -1e9))); queue> q; D[0][0][0] = v; q.emplace(0, 0, 0); while (!q.empty()) { int y, x, u; tie(y, x, u) = q.front(); q.pop(); if (y == n-1 && x == n-1) return true; int v = D[y][x][u]; if (y == oy && x == ox) { u = 1; v *= 2; } rep(dir, 4) { int ny = y + DY[dir]; int nx = x + DX[dir]; if (!inside(ny, nx, n, n)) continue; if (v - M[ny][nx] <= 0) continue; if (D[ny][nx][u] < v - M[ny][nx]) { D[ny][nx][u] = v - M[ny][nx]; q.emplace(ny, nx, u); } } } return false; } void Main() { cout << (solve() ? "YES" : "NO") << endl; } signed main() { cin.tie(nullptr); ios::sync_with_stdio(false); Main(); return 0; }