Codeforces刷题之路——41A Translation

A. Translation

time limit per test
2 seconds

memory limit per test
256 megabytes

input
standard input

output
standard output

The translation from the Berland language into the Birland language is not an easy task. Those languages are very similar: a berlandish word differs from a birlandish word with the same meaning a little: it is spelled (and pronounced) reversely. For example,
a Berlandish word code corresponds to a Birlandish word edoc.
However, it's easy to make a mistake during the «translation». Vasya translated word s from Berlandish into Birlandish as t.
Help him: find out if he translated the word correctly.

Input

The first line contains word s, the second line contains word t.
The words consist of lowercase Latin letters. The input data do not consist unnecessary spaces. The words are not empty and their lengths do not exceed 100 symbols.

Output

If the word t is a word s,
written reversely, print YES, otherwise print NO.

Examples

input

code
edoc

output

YES

input

abb
aba

output

NO

input

code
code

output

NO

题目大意：两个字符串str1与str2，一个正序一个逆序，看是否匹配相等。相等则输出YES，否则输出NO。
解题思路：水题，直接遍历匹配即可。

以下为解题代码（java解答）

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner scanner = new Scanner(System.in);
String str1 = scanner.nextLine();
String str2 = scanner.nextLine();
boolean flag = true;
int i = 0;
int j = str2.length()-1;
for(;i < str1.length();i++,j--){
if(str1.charAt(i) != str2.charAt(j)){
flag = false;
break;
}
}

if(flag){
System.out.println("YES");
}else{
System.out.println("NO");
}
scanner.close();
}
}