#pragma GCC optimize ("O3") #include "bits/stdc++.h" using namespace std; using ll = long long int; #define debugos clog #define debug(v) {printf("L%d %s > ",__LINE__,#v);debugos<<(v)< ",__LINE__,#v);for(auto e:(v)){debugos< ",__LINE__,#m);for(int x=0;x<(w);x++){debugos<<(m)[x]<<" ";}debugos<\n",__LINE__,#m);for(int y=0;y<(h);y++){for(int x=0;x<(w);x++){debugos<<(m)[y][x]<<" ";}debugos<::type>::type cnt=0;(cnt)<(l);++(cnt)) #define rrepeat(cnt,l) for(auto cnt=(l)-1;0<=(cnt);--(cnt)) #define iterate(cnt,b,e) for(auto cnt=(b);(cnt)!=(e);++(cnt)) #define diterate(cnt,b,e) for(auto cnt=(b);(cnt)!=(e);--(cnt)) const ll MD = 1000000007ll; const long double PI = 3.1415926535897932384626433832795L; inline void assert_call(bool assertion, function f) { if (!assertion) { cerr << "assertion fault:" << endl; f(); abort(); } } template inline ostream& operator <<(ostream &o, const pair p) { o << '(' << p.first << ':' << p.second << ')'; return o; } template inline ostream& _ostream_vecprint(ostream& os, const Vec& a) { os << '['; for (const auto& e : a) os << ' ' << e << ' '; os << ']'; return os; } template inline ostream& operator<<(ostream& o, const vector& v) { return _ostream_vecprint(o, v); } template inline ostream& operator<<(ostream& o, const array& v) { return _ostream_vecprint(o, v); } template inline T& maxset(T& to, const T& val) { return to = max(to, val); } template inline T& minset(T& to, const T& val) { return to = min(to, val); } void bye(string s, int code = 0) { cout << s << endl; exit(code); } mt19937_64 randdev(8901016); template inline T rand(T l, T h) { return uniform_int_distribution(l, h)(randdev); } template<> inline double rand(double l, double h) { return uniform_real_distribution(l, h)(randdev); } template<> inline float rand(float l, float h) { return uniform_real_distribution(l, h)(randdev); } #if defined(_WIN32) || defined(_WIN64) #define getchar_unlocked _getchar_nolock #define putchar_unlocked _putchar_nolock #elif defined(__GNUC__) #else #define getchar_unlocked getchar #define putchar_unlocked putchar #endif namespace { #define isvisiblechar(c) (0x21<=(c)&&(c)<=0x7E) class MaiScanner { public: template void input_integer(T& var) noexcept { var = 0; T sign = 1; int cc = getchar_unlocked(); for (; cc < '0' || '9' < cc; cc = getchar_unlocked()) if (cc == '-') sign = -1; for (; '0' <= cc && cc <= '9'; cc = getchar_unlocked()) var = (var << 3) + (var << 1) + cc - '0'; var = var * sign; } inline int c() noexcept { return getchar_unlocked(); } inline MaiScanner& operator>>(int& var) noexcept { input_integer(var); return *this; } inline MaiScanner& operator>>(long long& var) noexcept { input_integer(var); return *this; } inline MaiScanner& operator>>(string& var) { int cc = getchar_unlocked(); for (; !isvisiblechar(cc); cc = getchar_unlocked()); for (; isvisiblechar(cc); cc = getchar_unlocked()) var.push_back(cc); return *this; } template void in(IT begin, IT end) { for (auto it = begin; it != end; ++it) *this >> *it; } }; class MaiPrinter { public: template void output_integer(T var) noexcept { if (var == 0) { putchar_unlocked('0'); return; } if (var < 0) putchar_unlocked('-'), var = -var; char stack[32]; int stack_p = 0; while (var) stack[stack_p++] = '0' + (var % 10), var /= 10; while (stack_p) putchar_unlocked(stack[--stack_p]); } inline MaiPrinter& operator<<(char c) noexcept { putchar_unlocked(c); return *this; } inline MaiPrinter& operator<<(int var) noexcept { output_integer(var); return *this; } inline MaiPrinter& operator<<(long long var) noexcept { output_integer(var); return *this; } inline MaiPrinter& operator<<(char* str_p) noexcept { while (*str_p) putchar_unlocked(*(str_p++)); return *this; } inline MaiPrinter& operator<<(const string& str) { const char* p = str.c_str(); const char* l = p + str.size(); while (p < l) putchar_unlocked(*p++); return *this; } template void join(IT begin, IT end, char sep = ' ') { for (bool b = 0; begin != end; ++begin, b = 1) b ? *this << sep << *begin : *this << *begin; } }; } MaiScanner scanner; MaiPrinter printer; struct P { using T = int; T y, x; P(T _y = 0, T _x = 0) :y(_y), x(_x) {} inline bool operator == (P p) const { return y == p.y && x == p.x; } inline bool operator < (P p) const { return y == p.y ? x < p.x : y < p.y; } inline P operator+(P p) const { return P(y + p.y, x + p.x); } inline P operator-(P p) const { return P(y - p.y, x - p.x); } inline P operator+=(P p) { y += p.y; x += p.x; return *this; } inline P operator-=(P p) { y -= p.y; x -= p.x; return *this; } }; inline ostream& operator<<(ostream& os, P p) { os << '(' << p.y << ',' << p.x << ')'; return os; } const P FourMoving[] = { P(-1,0),P(0,1), P(1,0), P(0,-1) }; const P FiveMoving[] = { P(-1,0),P(0,1), P(1,0), P(0,-1), P(0,0) }; const P EightMoving[] = { P(-1,0),P(0,1), P(1,0), P(0,-1), P(-1,-1), P(-1,1), P(1,-1), P(1,1) }; template // using T = int; struct F { int height, width; vector data; F(int h = 1, int w = 1) :height(h), width(w), data(h*w) {} inline T& operator()(int y, int x) { return data[x + y * width]; } inline T& operator()(P p) { return data[p.x + p.y * width]; } inline T operator()(int y, int x) const { return data[x + y * width]; } inline T operator()(P p) const { return data[p.x + p.y * width]; } inline bool safe(int y, int x) const { return 0 <= y && y < height && 0 <= x && x < width; } inline bool safe(P p) const { return 0 <= p.y && p.y < height && 0 <= p.x && p.x < width; } inline void fill(T e) { std::fill(ALL(data), e); } inline void resize(int h, int w) { height = h; width = w; data.resize(h*w); } void print(ostream& os, int setw_arg = 4) { for (int y = 0; y < height; ++y) { for (int x = 0; x < width; ++x) os << setw(setw_arg) << operator()(y, x) << ' '; os << '\n'; } } }; /// /// 全てのセルに対してstartからの距離を求める /// /// gridの高さ /// gridの幅 /// 開始地点 /// costFunc(curr, dest): 現在地点currから隣接点destに移動する時に掛かるコストを返す関数 /// 開始地点からの最短距離 F grid_tour(int height, int width, P start, function costFunc) { priority_queue> pque; F dist(height, width); dist.fill(numeric_limits::max()); pque.emplace(0, start); dist(start) = 0; while (!pque.empty()) { auto dx = pque.top(); pque.pop(); dx.first = -dx.first; for (auto y : FourMoving) { y += dx.second; if (!dist.safe(y)) continue; auto c = costFunc(dx.second, y); if (c >= 0 && dist(y) > dx.first + c) { dist(y) = dx.first + c; pque.emplace(-(dx.first + c), y); } } } return dist; } int N, V, Oy, Ox; int main() { scanner >> N >> V >> Oy >> Ox; --Oy, --Ox; F field(N, N); repeat(i, N) repeat(j, N) scanner >> field(i, j); ll mujihi = field(N-1, N-1); auto dist = grid_tour(N, N, P(0, 0), [&](P from, P dest) {return field(dest); }); if (dist(N - 1, N - 1) + mujihi < V) bye("YES"); if (dist(Oy, Ox) >= V || Oy == -1) bye("NO"); auto dist2 = grid_tour(N, N, P(Oy, Ox), [&](P from, P dest) {return field(dest); }); if (dist2(N - 1, N - 1) + mujihi < (V - dist(Oy, Ox)) * 2) bye("YES"); bye("NO"); return 0; }