Datasets:
Tasks:
Text Generation
Modalities:
Text
Formats:
json
Languages:
English
Size:
< 1K
ArXiv:
Tags:
competitive-programming
code-generation
specification-generation
proof-generation
verification
rust
License:
File size: 1,875 Bytes
21f9b41 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | use vstd::prelude::*;
fn main() {}
verus! {
pub struct Solution;
pub open spec fn hour12_spec(h24: int) -> int
recommends 0 <= h24 <= 23,
{
if h24 == 0 {
12
} else if h24 <= 11 {
h24
} else if h24 == 12 {
12
} else {
h24 - 12
}
}
impl Solution {
pub fn convert_hour(h24: u8) -> (result: (u8, bool))
requires
h24 <= 23,
ensures
1 <= result.0 <= 12,
result.1 == (h24 >= 12),
(h24 == 0 ==> result.0 == 12),
(1 <= h24 <= 11 ==> result.0 == h24),
(h24 == 12 ==> result.0 == 12),
(13 <= h24 <= 23 ==> result.0 == h24 - 12),
{
if h24 == 0 {
(12, false)
} else if h24 < 12 {
(h24, false)
} else if h24 == 12 {
(12, true)
} else {
(h24 - 12, true)
}
}
pub fn convert_time(h24: u8, minute: u8) -> (result: Vec<u8>)
requires
h24 <= 23,
minute <= 59,
ensures
result.len() == 8,
result[0] as int == 48 + hour12_spec(h24 as int) / 10,
result[1] as int == 48 + hour12_spec(h24 as int) % 10,
result[2] == 58u8,
result[3] as int == 48 + (minute as int) / 10,
result[4] as int == 48 + (minute as int) % 10,
result[5] == 32u8,
result[6] == if h24 >= 12 { 80u8 } else { 65u8 },
result[7] == 77u8,
{
let (h12, is_pm) = Self::convert_hour(h24);
let mut out = Vec::new();
out.push(48u8 + h12 / 10);
out.push(48u8 + h12 % 10);
out.push(58u8);
out.push(48u8 + minute / 10);
out.push(48u8 + minute % 10);
out.push(32u8);
out.push(if is_pm { 80u8 } else { 65u8 });
out.push(77u8);
out
}
}
}
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