Contest: Task: Related: TaskB

Score : $100$ points

You planned a trip using trains and buses. The train fare will be $A$ yen (the currency of Japan) if you buy ordinary tickets along the way, and $B$ yen if you buy an unlimited ticket. Similarly, the bus fare will be $C$ yen if you buy ordinary tickets along the way, and $D$ yen if you buy an unlimited ticket.

Find the minimum total fare when the optimal choices are made for trains and buses.

- $1 \leq A \leq 1$ $000$
- $1 \leq B \leq 1$ $000$
- $1 \leq C \leq 1$ $000$
- $1 \leq D \leq 1$ $000$
- All input values are integers.

Input is given from Standard Input in the following format:

$A$ $B$ $C$ $D$

Print the minimum total fare.

600 300 220 420

520

The train fare will be $600$ yen if you buy ordinary tickets, and $300$ yen if you buy an unlimited ticket. Thus, the optimal choice for trains is to buy an unlimited ticket for $300$ yen. On the other hand, the optimal choice for buses is to buy ordinary tickets for $220$ yen.

Therefore, the minimum total fare is $300 + 220 = 520$ yen.

555 555 400 200

755

549 817 715 603

1152