FilesExpand file tree

 master

/

reverseInt.java

Copy path

BlameMore file actions

BlameMore file actions

Latest commit

 

History

History

History

55 lines (47 loc) · 1.46 KB

 master

/

reverseInt.java

Top

File metadata and controls

• Code
• Blame

55 lines (47 loc) · 1.46 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

package LeetCodeOJ;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class reverseInt {

// public static int reverse(int x){

// int flag = 0;

// if (x < 0){

// flag = 1;

// x = -1 * x;

// }

// long sum = 0;

// long n = String.valueOf(x).length();

// int i = 0;

// while((x % 10) !=0 || i != n){

// sum += (x % 10) * Math.pow(10, n - i - 1);

// x = x / 10;

// i += 1;

// }

// if (flag == 1){

// sum = -1 * sum;

// }

// return sum >Math.pow(2, 31) - 1||sum <-Math.pow(2, 31)? 0: (int)sum;

// }

public static int reverse(int x){

long sum = 0;

while(x !=0){

sum = sum * 10 + x %10;

if (sum > Integer.MAX_VALUE || sum < Integer.MIN_VALUE){

return 0;

}

x = x / 10;

}

return (int)sum;

}

public static void main(String[] args) throws IOException {

// TODO Auto-generated method stub

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

String line;

while ((line = in.readLine()) != null) {

int x = Integer.parseInt(line);

int ret = new reverseInt().reverse(x);

String out = String.valueOf(ret);

System.out.print(out);

}

}

}