#include // #include using namespace std; #define lli long long int #define REP(i, s, n) for (lli i = s; i < n; i++) #define INF (1LL << 62) #define DEBUG 0 #define mp(a, b) make_pair(a, b) #define SORT(V) sort(V.begin(), V.end()) #define PI (3.141592653589794) #define TO_STRING(VariableName) #VariableName #define LOG1(x) \ if (DEBUG) cout << TO_STRING(x) << "=" << x << " " << endl; #define LOG2(x, y) \ if (DEBUG) \ cout << TO_STRING(x) << "=" << x << " " << TO_STRING(y) << "=" << y \ << endl; #define LOG3(x, y, z) \ if (DEBUG) \ cout << TO_STRING(x) << "=" << x << " " << TO_STRING(y) << "=" << y \ << " " << TO_STRING(z) << "=" << z << endl; #define LOG4(w, x, y, z) \ if (DEBUG) \ cout << TO_STRING(w) << "=" << w << " " << TO_STRING(x) << "=" << x \ << " " << TO_STRING(y) << "=" << y << " " << TO_STRING(z) << "=" \ << z << endl; #define LOG5(w, x, y, z, a) \ if (DEBUG) \ cout << TO_STRING(w) << "=" << w << " " << TO_STRING(x) << "=" << x \ << " " << TO_STRING(y) << "=" << y << " " << TO_STRING(z) << "=" \ << z << " " << TO_STRING(a) << "=" << a << endl; #define LOG6(w, x, y, z, a, b) \ if (DEBUG) \ cout << TO_STRING(w) << "=" << w << " " << TO_STRING(x) << "=" << x \ << " " << TO_STRING(y) << "=" << y << " " << TO_STRING(z) << "=" \ << z << " " << TO_STRING(a) << "=" << a << " " << TO_STRING(b) \ << "=" << b << endl; #define overload6(a, b, c, d, e, f, g, ...) g #define LOG(...) \ overload6(__VA_ARGS__, LOG6, LOG5, LOG4, LOG3, LOG2, LOG1)(__VA_ARGS__) template bool chmax(T &a, const T &b) { if (a < b) { a = b; return 1; } return 0; } template bool chmin(T &a, const T &b) { if (b < a) { a = b; return 1; } return 0; } mt19937 engine; std::chrono::system_clock::time_point start, endTime; std::ostream &operator<<(std::ostream &dest, __int128_t value) { std::ostream::sentry s(dest); if (s) { __uint128_t tmp = value < 0 ? -value : value; char buffer[128]; char *d = std::end(buffer); do { --d; *d = "0123456789"[tmp % 10]; tmp /= 10; } while (tmp != 0); if (value < 0) { --d; *d = '-'; } int len = std::end(buffer) - d; if (dest.rdbuf()->sputn(d, len) != len) { dest.setstate(std::ios_base::badbit); } } return dest; } __int128 parse(string &s) { __int128 ret = 0; for (int i = 0; i < s.length(); i++) { if ('0' <= s[i] && s[i] <= '9') { ret = 10 * ret + s[i] - '0'; } } return ret; } lli gcd(lli a, lli b) { if (a == 0) return b; if (b == 0) return a; if (a % b == 0) { return b; } else { return gcd(b, a % b); } } void solve() { lli A, B, a, b; cin >> A >> B >> a >> b; REP(x, 0, 100000000) { if (x % A == a && x % B == b) { cout << x << endl; return; } } } // Generated by 2.12.0 https://github.com/kyuridenamida/atcoder-tools (tips: // You use the default template now. You can remove this line by using your // custom template) int main() { lli n = 1; // cin>>n; while (n--) solve(); return 0; } struct Setup { Setup() { cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(15); } } __Setup;