#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define INIT std::ios::sync_with_stdio(false);std::cin.tie(0); #define VAR(type, ...)type __VA_ARGS__;Scan(__VA_ARGS__); template void Scan(T& t) { std::cin >> t; } templatevoid Scan(First& first, Rest&...rest) { std::cin >> first; Scan(rest...); } #define OUT(d) std::cout< c(n);for(auto& i:c)std::cin>>i; #define MAT(type, c, m, n) std::vector> c(m, std::vector(n));for(auto& r:c)for(auto& i:r)std::cin>>i; #define ALL(a) (a).begin(),(a).end() #define FOR(i, a, b) for(int i=(a);i<(b);++i) #define RFOR(i, a, b) for(int i=(b)-1;i>=(a);--i) #define REP(i, n) for(int i=0;i=0;--i) #define FORLL(i, a, b) for(ll i=ll(a);i=ll(a);--i) #define REPLL(i, n) for(ll i=0;i=0;--i) #define PAIR std::pair #define IN(a, x, b) (a<=x && x(end-start).count();std::cerr<<"[Time:"< tmp(a);std::cout << #a << "\t:";for(int i=0; i(a.size()); ++i){std::cout << tmp.front() << "\n";tmp.pop();}std::cout << "\n";} #define CHMAX(a, b) a = (((a)<(b)) ? (b) : (a)) #define CHMIN(a, b) a = (((a)>(b)) ? (b) : (a)) //#define int ll using ll = long long; using ull = unsigned long long; constexpr int INFINT = 1 << 30; constexpr ll INFLL = 1LL << 60; constexpr double EPS = 0.0000000001; constexpr int MOD = 1000000007; int hp[200][200]; signed main() { INIT; VAR(int, n, v, ox, oy); --ox; --oy; MAT(int, g, n, n); std::vector> hp(n, std::vector(n, -1)); std::function dfs = [&](int y, int x) { if (y > 0 && hp[y][x] - g[y - 1][x] > hp[y - 1][x]) { hp[y - 1][x] = hp[y][x] - g[y - 1][x]; dfs(y - 1, x); } if (x > 0 && hp[y][x] - g[y][x - 1] > hp[y][x - 1]) { hp[y][x - 1] = hp[y][x] - g[y][x - 1]; dfs(y, x - 1); } if (y < n - 1 && hp[y][x] - g[y + 1][x] > hp[y + 1][x]) { hp[y + 1][x] = hp[y][x] - g[y + 1][x]; dfs(y + 1, x); } if (x < n - 1 && hp[y][x] - g[y][x + 1] > hp[y][x + 1]) { hp[y][x + 1] = hp[y][x] - g[y][x + 1]; dfs(y, x + 1); } }; hp[0][0] = v; dfs(0, 0); if (ox != -1 || oy != -1) { hp[oy][ox] *= 2; dfs(oy, ox); } if (hp[n - 1][n - 1] > 0) { OUT("YES")BR; } else { OUT("NO")BR; } return 0; }