Consecutive characters

String

60.3% acceptance

Feb 25, 2026

1842

The power of the string is the maximum length of a non-empty substring that contains only one unique character. Given a string s, return the power of s.

Solution

Rust

Time O(n)

Space O(1)

LeetCode

solution.rs

impl Solution {
  pub fn max_power(s: String) -> i32 {
    let bytes = s.as_bytes();
    let mut best = 1;
    let mut cur = 1;
    for i in 1..bytes.len() {
      if bytes[i] == bytes[i-1] { cur += 1; best = best.max(cur); }
      else { cur = 1; }
    }
    best
  }
}