D - Shipping Center

Score : $400$ points

Problem Statement

We have $N$ pieces of baggage called Baggage $1$ through $N$, and $M$ boxes called Box $1$ through $M$.

Baggage $i$ has a size of $W_i$ and a value of $V_i$.

Box $i$ can contain a piece of baggage whose size of at most $X_i$. It cannot contain two or more pieces of baggage.

You will be given $Q$ queries. In each query, given two integers $L$ and $R$, solve the following problem:

• Problem: Out of the $M$ boxes, $R-L+1$ boxes, Box $L,L+1,\ldots,R$, have become unavailable. Find the maximum possible total value of a set of baggage that we can put into the remaining boxes simultaneously.

Constraints

• $1 \leq N \leq 50$
• $1 \leq M \leq 50$
• $1 \leq Q \leq 50$
• $1 \leq W_i \leq 10^6$
• $1 \leq V_i \leq 10^6$
• $1 \leq X_i \leq 10^6$
• $1 \leq L \leq R \leq M$
• All values in input are integers.

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Input

Input is given from Standard Input in the following format:

$N$ $M$ $Q$

$W_1$ $V_1$

$\vdots$

$W_N$ $V_N$

$X_1$ $\ldots$ $X_M$

$\mathrm{Query}_1$

$\vdots$

$\mathrm{Query}_Q$

Each Query is in the following format:

``` $L$ $R$ ```

Output

Print $Q$ lines.

The $i$-th line should contain the answer to the problem described by $\mathrm{Query}_i$.

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3 4 3
1 9
5 3
7 8
1 8 6 9
4 4
1 4
1 3

20
0
9

In the $1$-st query, only Box $4$ is unavailable. By putting Baggage $1$ into Box $1$, Baggage $3$ into Box $2$, and Baggage $2$ into Box $3$, we can put all baggage into boxes, making the total value of baggage in boxes $20$.

In the $2$-nd query, all boxes are unavailable; the answer is $0$.

In the $3$-rd query, only Box $4$ is available. By putting Baggage $1$ into Box $4$, we can make the total value of baggage in boxes $9$, which is the maximum possible result.