分享｜ARTS 1101: 最长回文串与子序列匹配、一次 URL 请求的来回之旅与如何验证 AI 的交付

class Solution {
		public int longestPalindrome(String s) {
        HashMap<Character, Integer> strMap = new HashMap<>();
        for (char c : s.toCharArray()) {
            strMap.merge(c, 1, Integer::sum);
        }
        int size = 0;
        boolean haveSingleChar = false;
        for (Map.Entry<Character, Integer> entry : strMap.entrySet()) {
            Integer value = entry.getValue();
            if (value % 2 != 0) {
                haveSingleChar = true;
                value = value - 1;
            }
            if (value <= 0) {
                continue;
            }
            size += value;
        }
        return haveSingleChar ? ++size : size;
    }
}

class Solution {
    public int longestPalindrome(String s) {
        Set<Character> set = new HashSet<>();
        int length = 0;
        for (char c : s.toCharArray()) {
            boolean ifPresent = set.add(c);
            if (!ifPresent) {
                set.remove(c);
                length = length + 2;
            }
        }
        return set.isEmpty() ? length : length + 1;
    }
}

 public boolean isSubsequence(String s, String t) {
        // 双指针解决
        if (s.length() > t.length()) {
            return false;
        }

        int index = 0;
        boolean isFound = false;
        for (int i = 0; i < s.length(); i++) {
            isFound = false;
            for (int j = index; j < t.length(); j++) {
                if (t.charAt(j) == s.charAt(i)) {
                    index = j + 1;
                    isFound = true;
                    break;
                }
            }
            if (!isFound) {
                return false;
            }
        }
        return true;
    }

{
  "env": {
    "CLAUDE_CODE_DISABLE_1M_CONTEXT": "1"
  },
  "statusLine": {
    "type": "command",
    "command": "bash \"$HOME/.claude/statusline.sh\""
  }
}

#!/usr/bin/env bash
# Claude Code status line. Requires jq.
set -u

# Claude Code sends one JSON object to stdin on every refresh.
IFS=$'\t' read -r model effort ctx hit used5 reset5 used7 reset7 < <(
  jq -r '
    def percent:
      if type == "number" then ([0, ([100, .] | min)] | max | round)
      else "NA" end;
    [
      (.model.display_name // "Unknown"),
      (.effort.level // "N/A"),
      (.context_window.used_percentage | percent),
      (.prompt_cache.hit_ratio | if type == "number" then (. * 100 | round) else "NA" end),
      (.rate_limits.five_hour.used_percentage | percent),
      (.rate_limits.five_hour.resets_at // "NA"),
      (.rate_limits.seven_day.used_percentage | percent),
      (.rate_limits.seven_day.resets_at // "NA")
    ] | @tsv
  '
)

RESET=$'\033[0m'
DIM=$'\033[2m'
MODEL_COLOR=$'\033[1;35m'
CYAN=$'\033[36m'
SEPARATOR=$'\033[38;2;130;130;130m'
TRACK=$'\033[38;2;120;120;120m'
GREEN=$'\033[32m'
YELLOW=$'\033[33m'
RED=$'\033[31m'

percent_text() {
  if [[ $1 =~ ^[0-9]+$ ]]; then printf '%d%%' "$1"; else printf '%s' '--%'; fi
}

left_text() {
  if [[ $1 =~ ^[0-9]+$ ]]; then printf '%d%%' "$((100 - $1))"; else printf '%s' '--%'; fi
}

reset_after() {
  local ts=$1 seconds days hours mins
  if [[ ! $ts =~ ^[0-9]+([.][0-9]+)?$ ]]; then printf '%s' '--'; return; fi
  seconds=$(( ${ts%%.*} - NOW ))
  (( seconds < 0 )) && seconds=0
  days=$((seconds / 86400))
  hours=$(((seconds % 86400) / 3600))
  mins=$(((seconds % 3600) / 60))
  if (( days > 0 )); then
    printf '%dd %dh' "$days" "$hours"
  elif (( hours > 0 )); then
    printf '%dh %dm' "$hours" "$mins"
  else
    printf '%dm' "$mins"
  fi
}

# Gradient uses stable, full-width block characters: no fractional glyphs.
context_bar() {
  local pct=$1 width=20 filled=0 i pos r g b offset
  if [[ $pct =~ ^[0-9]+$ ]]; then filled=$(((pct * width + 50) / 100)); fi
  for ((i = 0; i < width; i++)); do
    if (( i >= filled )); then
      printf '%s░' "$TRACK"
      continue
    fi
    pos=$((i * 100 / (width - 1)))
    if ((pos <= 50)); then
      r=$(( 0 + 220 * pos / 50 ))
      g=200
      b=$(( 80 - 80 * pos / 50 ))
    else
      offset=$((pos - 50))
      r=220
      g=$(( 200 - 160 * offset / 50 ))
      b=$(( 20 * offset / 50 ))
    fi
    printf '\033[38;2;%d;%d;%dm█' "$r" "$g" "$b"
  done
  printf '%s' "$RESET"
}

usage_color() {
  if [[ ! $1 =~ ^[0-9]+$ ]] || (( $1 < 70 )); then printf '%s' "$GREEN"
  elif (( $1 < 90 )); then printf '%s' "$YELLOW"
  else printf '%s' "$RED"; fi
}

NOW=$(date +%s)
ctx_label=$(percent_text "$ctx")
hit_label=$(percent_text "$hit")
five_left=$(left_text "$used5")
seven_left=$(left_text "$used7")
five_reset=$(reset_after "$reset5")
seven_reset=$(reset_after "$reset7")
ctx_color=$(usage_color "$ctx")
five_color=$(usage_color "$used5")
seven_color=$(usage_color "$used7")

printf '%s[%s · %s]%s  ' "$MODEL_COLOR" "$model" "$effort" "$RESET"
context_bar "$ctx"
printf '  %s%s%s  %s│%s  %sHit%s %s%s\n' "$ctx_color" "$ctx_label" "$RESET" "$SEPARATOR" "$RESET" "$CYAN" "$RESET" "$CYAN" "$hit_label"
printf '5h  %s%s%s left %s·%s reset %s  %s│%s  7d  %s%s%s left %s·%s reset %s\n' \
  "$five_color" "$five_left" "$RESET" "$DIM" "$RESET" "$five_reset" "$SEPARATOR" "$RESET" \
  "$seven_color" "$seven_left" "$RESET" "$DIM" "$RESET" "$seven_reset"