42 . 五捨六入

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Hanni

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Description

給你兩數值 $a,\ b$，請你求出 $\frac{a}{b}$ 五捨六入到整數位的值。
例如：$\frac{5}{2} = 2.5$，因為小數第一位是 $5$，五捨六入到整數位過後是 $2$。$\frac{9}{10} = 0.9$，因為小數第一位是 $9$，五捨六入到整數位過後是 $1$。

對於所有測試資料：
$1 \le a,\ b \le $ $10$$18$

Input Format

輸入僅一行，有兩個整數 $a,\ b$。

Output Format

輸出一個整數代表 $\frac{a}{b}$ 五捨六入到整數位的值。

Sample Input 1

5 2

Sample Output 1

2

Sample Input 2

9 10

Sample Output 2

1

Sample Input 3

23 5

Sample Output 3

5

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Problem Source

Subtasks

No. Testdata Range Constraints Score
1 0~2 範例測試資料。 0
2 0~22 $1 \le a,\ b \le 10$$3$ 25
3 0~42 $1 \le a,\ b \le 10$$6$ 25
4 0~62 $1 \le a,\ b \le 10$$9$ 20
5 0~82 無額外限制。 30

Testdata and Limits

No. Time Limit (ms) Memory Limit (VSS, KiB) Output Limit (KiB) Subtasks
0 1000 65536 65536 1 2 3 4 5
1 1000 65536 65536 1 2 3 4 5
2 1000 65536 65536 1 2 3 4 5
3 1000 65536 65536 2 3 4 5
4 1000 65536 65536 2 3 4 5
5 1000 65536 65536 2 3 4 5
6 1000 65536 65536 2 3 4 5
7 1000 65536 65536 2 3 4 5
8 1000 65536 65536 2 3 4 5
9 1000 65536 65536 2 3 4 5
10 1000 65536 65536 2 3 4 5
11 1000 65536 65536 2 3 4 5
12 1000 65536 65536 2 3 4 5
13 1000 65536 65536 2 3 4 5
14 1000 65536 65536 2 3 4 5
15 1000 65536 65536 2 3 4 5
16 1000 65536 65536 2 3 4 5
17 1000 65536 65536 2 3 4 5
18 1000 65536 65536 2 3 4 5
19 1000 65536 65536 2 3 4 5
20 1000 65536 65536 2 3 4 5
21 1000 65536 65536 2 3 4 5
22 1000 65536 65536 2 3 4 5
23 1000 65536 65536 3 4 5
24 1000 65536 65536 3 4 5
25 1000 65536 65536 3 4 5
26 1000 65536 65536 3 4 5
27 1000 65536 65536 3 4 5
28 1000 65536 65536 3 4 5
29 1000 65536 65536 3 4 5
30 1000 65536 65536 3 4 5
31 1000 65536 65536 3 4 5
32 1000 65536 65536 3 4 5
33 1000 65536 65536 3 4 5
34 1000 65536 65536 3 4 5
35 1000 65536 65536 3 4 5
36 1000 65536 65536 3 4 5
37 1000 65536 65536 3 4 5
38 1000 65536 65536 3 4 5
39 1000 65536 65536 3 4 5
40 1000 65536 65536 3 4 5
41 1000 65536 65536 3 4 5
42 1000 65536 65536 3 4 5
43 1000 65536 65536 4 5
44 1000 65536 65536 4 5
45 1000 65536 65536 4 5
46 1000 65536 65536 4 5
47 1000 65536 65536 4 5
48 1000 65536 65536 4 5
49 1000 65536 65536 4 5
50 1000 65536 65536 4 5
51 1000 65536 65536 4 5
52 1000 65536 65536 4 5
53 1000 65536 65536 4 5
54 1000 65536 65536 4 5
55 1000 65536 65536 4 5
56 1000 65536 65536 4 5
57 1000 65536 65536 4 5
58 1000 65536 65536 4 5
59 1000 65536 65536 4 5
60 1000 65536 65536 4 5
61 1000 65536 65536 4 5
62 1000 65536 65536 4 5
63 1000 65536 65536 5
64 1000 65536 65536 5
65 1000 65536 65536 5
66 1000 65536 65536 5
67 1000 65536 65536 5
68 1000 65536 65536 5
69 1000 65536 65536 5
70 1000 65536 65536 5
71 1000 65536 65536 5
72 1000 65536 65536 5
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74 1000 65536 65536 5
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76 1000 65536 65536 5
77 1000 65536 65536 5
78 1000 65536 65536 5
79 1000 65536 65536 5
80 1000 65536 65536 5
81 1000 65536 65536 5
82 1000 65536 65536 5
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