import std.conv, std.functional, std.stdio, std.string; import std.algorithm, std.array, std.bigint, std.container, std.math, std.numeric, std.range, std.regex, std.typecons; import core.bitop; class EOFException : Throwable { this() { super("EOF"); } } string[] tokens; string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; } int readInt() { return readToken.to!int; } long readLong() { return readToken.to!long; } real readReal() { return readToken.to!real; } bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } } bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } } int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; } int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); } int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); } enum INF = 10^^9; int N, V, OX, OY; int[][] L; int[][] dijkstra(int sx, int sy) { alias Node = Tuple!(int, "c", int, "x", int, "y"); auto q = BinaryHeap!(Array!Node, "a.c > b.c")(); auto d = new int[][](N, N); foreach (x; 0 .. N) foreach (y; 0 .. N) { d[x][y] = INF; } d[sx][sy] = 0; q.insert(Node(0, sx, sy)); for (; !q.empty; ) { const c = q.front.c; const x = q.front.x; const y = q.front.y; q.removeFront; if (d[x][y] == c) { foreach (dir; 0 .. 4) { const xx = x + [+1, 0, -1, 0][dir]; const yy = y + [0, +1, 0, -1][dir]; if (0 <= xx && xx < N && 0 <= yy && yy < N) { const cc = c + L[xx][yy]; if (d[xx][yy] > cc) { d[xx][yy] = cc; q.insert(Node(cc, xx, yy)); } } } } } return d; } void main() { try { for (; ; ) { N = readInt(); V = readInt(); OY = readInt() - 1; OX = readInt() - 1; L = new int[][](N, N); foreach (x; 0 .. N) foreach (y; 0 .. N) { L[x][y] = readInt(); } bool ans; auto d0 = dijkstra(0, 0); if (V - d0[N - 1][N - 1] > 0) { ans = true; } if (OX != -1) { auto d1 = dijkstra(OX, OY); if (V - d0[OX][OY] > 0 && (V - d0[OX][OY]) * 2 - d1[N - 1][N - 1] > 0) { ans = true; } } writeln(ans ? "YES" : "NO"); } } catch (EOFException e) { } }