#include using namespace std; struct iofast_t { iofast_t() { ios::sync_with_stdio(false); cin.tie(nullptr); } } iofast; struct uns_t {} uns; template auto vec(Element init, Head arg, Args ...args) { if constexpr (sizeof...(Args) == 0) return std::vector(arg, init); else return std::vector(arg, vec(init, args...)); } template auto vec(uns_t, Head arg, Args ...args) { return vec(Element(), arg, args...); } template > T &chmin(T &l, T r, Compare &&f = less()) { return l = min(l, r, f); } template > T &chmax(T &l, T r, Compare &&f = less()) { return l = max(l, r, f); } int main() { int n; cin >> n; auto a = vec(uns, n); auto b = vec(uns, n); for (int i = 0; i < n; ++i) { cin >> a[i] >> b[i]; } auto idx = vec(uns, n); iota(begin(idx), end(idx), 0); sort(begin(idx), end(idx), [&](auto x, auto y) { return b[x] < b[y]; }); int64_t sum = 0; for (auto i : idx) { if (b[i] < sum) { cout << "No" << endl; return 0; } sum += a[i]; } cout << "Yes" << endl; }