#ifndef hari64 #include #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #define debug(...) #else #include "util/viewer.hpp" #define debug(...) viewer::_debug(__LINE__, #__VA_ARGS__, __VA_ARGS__) #endif // clang-format off using namespace std; using ll = long long; using ld = long double; using pii = pair; using pll = pair; template using vc = vector; template using vvc = vector>; template using vvvc = vector>; using vi = vc; using vll = vc; using vpii = vc; using vpll = vc; using vvi = vc; using vvll = vc; using vvpi = vc; using vvpll = vc; constexpr int INF = 1001001001; constexpr long long INFll = 1001001001001001001; template bool chmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; } template bool chmin(T& a, const T& b) { return a > b ? a = b, 1 : 0; } // clang-format on int main() { cin.tie(0); ios::sync_with_stdio(false); ll A, B; cin >> A >> B; ll C, D; cin >> C >> D; cout << A * C - B * D << " " << B * C + A * D << endl; return 0; }