intmain() { int a, b; ll x, y; while (~scanf("%d %d", &a, &b)) { int d = ex_gcd(a, b, x, y); if (d != 1) { cout << "sorry" << endl; continue; } while (x <= 0) { x = x + b; y = y - a; } cout << x << ' ' << y << endl; } return0; }
intmain() { int t; while (~scanf("%d", &t)) { for (int i = 0; i < t; i++) { int a, b; scanf("%d%d", &a, &b); int g = gcd(a, b); if (g == 1) printf("%d\n", a * b - a - b); else printf("-1\n"); } } return0; }