AtCoder Beginner Contest 171
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Problem Statement
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You have a sequence $A$ composed of $N$ positive integers: $A_{1}, A_{2}, \cdots, A_{N}$.
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You will now successively do the following $Q$ operations:
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- In the
$i$-th operation, you replace every element whose value is$B_{i}$with$C_{i}$.
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For each $i$ $(1 \leq i \leq Q)$, find $S_{i}$: the sum of all elements in $A$ just after the $i$-th operation.
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Constraints
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- All values in input are integers.
$1 \leq N, Q, A_{i}, B_{i}, C_{i} \leq 10^{5}$$B_{i} \neq C_{i}$
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Input
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Input is given from Standard Input in the following format:
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N
A_{1} A_{2} \cdots A_{N}
Q
B_{1} C_{1}
B_{2} C_{2}
\vdots
B_{Q} C_{Q}
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Output
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Print $Q$ integers $S_{i}$ to Standard Output in the following format:
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S_{1}
S_{2}
\vdots
S_{Q}
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Note that $S_{i}$ may not fit into a $32$-bit integer.
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样例
Input #1
4
1 2 3 4
3
1 2
3 4
2 4
Output #1
11
12
16
Initially, the sequence $A$ is $1,2,3,4$.
After each operation, it becomes the following:
- $2, 2, 3, 4$
- $2, 2, 4, 4$
- $4, 4, 4, 4$
Input #2
4
1 1 1 1
3
1 2
2 1
3 5
Output #2
8
4
4
Note that the sequence $A$ may not contain an element whose value is $B_{i}$.
Input #3
2
1 2
3
1 100
2 100
100 1000
Output #3
102
200
2000
题目信息
题面与样例版权归 AtCoder 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。