create dev channel

zeta/py/1214.py

@@ -0,0 +1,24 @@
+# Px+Qy >= D
+def solve(D, P, Q):
+    if D % P == 0 or D % Q == 0:
+        return D
+    Q, P = sorted((P, Q))
+    p_bound = (D // P) + 1
+
+    min_S = 10 ** 13
+    for x in range(0, p_bound + 1):
+
+        d, m = divmod(D - P * x, Q)
+        if m == 0:
+            return D
+        new_S = (d + 1) * Q + P * x
+        if new_S < min_S:
+            min_S = new_S
+            if min_S == D:
+                return min_S
+    return min_S
+
+
+if __name__ == '__main__':
+    D, P, Q = map(int, input().split())
+    print(solve(D, P, Q))