ARTS 打卡（2020.06.29-2020.07.04）

class Solution {
    public String convert(String s, int numRows) {
        if (numRows == 1) return s;
        List<StringBuilder> list = new ArrayList<>();
        for (int i = 0; i < Math.min(numRows, s.length()); i++) {
            list.add(new StringBuilder());
        }
        int curRow = 0;
        boolean b = false;
        for (char c : s.toCharArray()) {
            list.get(curRow).append(c);
            if(curRow == 0 || curRow == numRows - 1) {
                b = !b;
            }
            curRow += b ? 1 : -1;
        }
        StringBuilder ret = new StringBuilder();
        for (StringBuilder row : list) ret.append(row);
        return ret.toString();
    }
}

class Solution {
    public int reverse(int x) {
        if(x > Integer.MAX_VALUE) {
            return 0;
        }
        if(x < Integer.MIN_VALUE) {
            return 0;
        }
        long ys = 0L;
        int shang = x / 10;
        while (x != 0) {
            ys = ys * 10 + x % 10;
            if(ys > Integer.MAX_VALUE) {
                return 0;
            }
            if(ys < Integer.MIN_VALUE) {
                return 0;
            }
            x = shang;
            shang /= 10;
        }
        return (int) ys;
    }
}

//demo
public static void writeToFileZipFileContents(String zipFileName, String outputFileName)
      throws java.io.IOException {
      java.nio.charset.Charset charset = java.nio.charset.Charset.forName("US-ASCII");
      java.nio.file.Path outputFilePath = java.nio.file.Paths.get(outputFileName);
      // Open zip file and create output file with try-with-resources statement
      try (
        java.util.zip.ZipFile zf = new java.util.zip.ZipFile(zipFileName);
        java.io.BufferedWriter writer = java.nio.file.Files.newBufferedWriter(outputFilePath, charset)
      ) {
        // Enumerate each entry
        for (java.util.Enumeration entries = zf.entries(); entries.hasMoreElements();) {
          // Get the entry name and write it to the output file
          String newLine = System.getProperty("line.separator");
          String zipEntryName = ((java.util.zip.ZipEntry)entries.nextElement()).getName() + newLine;
          writer.write(zipEntryName, 0, zipEntryName.length());
        }
      }
    }