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zigzag-conversion.rs
70 lines (63 loc) · 1.58 KB
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zigzag-conversion.rs
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struct Solution;
impl Solution {
pub fn convert(s: String, num_rows: i32) -> String {
let mut v: Vec<Vec<char>> = Vec::new();
for _ in 0..num_rows {
v.push(Vec::new());
}
let num_rows = num_rows as usize - 1;
let mut index = 0;
let mut column = 0;
let mut ele = num_rows - 1;
for c in s.chars() {
if column == 0 || column == num_rows {
v[index].push(c);
} else {
v[ele].push(c);
ele -= 1;
if ele == 0 {
ele = num_rows - 1;
index = 0;
}
column += 1;
if column >= num_rows {
column = 0;
}
continue;
}
index += 1;
if index > num_rows {
index = 0;
column += 1;
if column >= num_rows {
column = 0;
}
}
}
let mut ans = String::new();
for i in v {
for c in i {
ans.push(c);
}
}
ans
}
}
fn main() {
Solution::convert("PAYPALISHIRING".to_string(), 3);
}
#[cfg(test)]
mod tests {
use crate::Solution;
#[test]
fn test_impl1() {
assert_eq!(
Solution::convert("PAYPALISHIRING".to_string(), 3),
"PAHNAPLSIIGYIR"
);
assert_eq!(
Solution::convert("PAYPALISHIRING".to_string(), 4),
"PINALSIGYAHRPI"
);
}
}