teamnote history merge

2024fall/source/Math/CRT.cpp

@@ -0,0 +1,14 @@
+pll crt(pll p, pll q)
+{
+    if(p.fi > q.fi) swap(p, q);
+    auto [a, A] = p;
+    auto [b, B] = q;
+
+    ll g = gcd(A, B);
+    if((b-a)%g != 0) return {-1, -1};
+    
+    ll i = A, j = B, k = b-a;
+    i/=g; j/=g; k/=g;
+    auto [x, y] = diophantos(i, j);
+    return {(ll)((a+(lll)A*k*x)%(A*B/g)), A*B/g};
+}