import 'dart:math';

class Solution {
  List<int> shortestToChar(String s, String c) {
    List<int> res = List.filled(s.length, 0);
    int c_position = s.length;
    for (int i = 0; i < s.length; i++) {
      if (s[i] == c) {
         c_positi
      }
      res[i] = (i - c_position).abs();
    }
    for (int i = s.length - 1; i >= 0; i--) {
      if (s[i] == c) {
        c_position = i;
      }
      res[i] = min(res[i], (i - c_position).abs());
    }
    return res;
  }
}

void main() {
  String s = "aaaabaaa";
  String c = "b";
  print(Solution().shortestToChar(s, c));
}