Decompiling the class file:
```javaimport java.util.Arrays;
// // Decompiled by Procyon v0.5.36// 
public class EZrev{    public static void main(final String[] array) {        if (array.length != 1) {            System.out.println("L");            return;        }        final String s = array[0];        if (s.length() != 31) {            System.out.println("L");            return;        }        final int[] array2 = s.chars().toArray();        for (int i = 0; i < array2.length; ++i) {            if (i % 2 == 0) {                array2[i] = (char)(array2[i] ^ 0x13);            }            else {                array2[i] = (char)(array2[i] ^ 0x37);            }        }        for (int j = 0; j < array2.length / 2; ++j) {            if (j % 2 == 0) {                final int n = array2[j] - 10;                array2[j] = (char)(array2[array2.length - 1 - j] + 20);                array2[array2.length - 1 - j] = (char)n;            }            else {                array2[j] = (char)(array2[j] + 30);            }        }        if (Arrays.equals(array2, new int[] { 130, 37, 70, 115, 64, 106, 143, 34, 54, 134, 96, 98, 125, 98, 138, 104, 25, 3, 66, 78, 24, 69, 91, 80, 87, 67, 95, 8, 25, 22, 115 })) {            System.out.println("W");        }        else {            System.out.println("L");        }    }}```
Reverse the process using the script to get the flag (credits to my [teammate](https://github.com/hollowcrust))
```pya = [130, 37, 70, 115, 64, 106, 143, 34, 54, 134, 96, 98, 125, 98, 138, 104, 25, 3, 66, 78, 24, 69, 91, 80, 87, 67, 95, 8, 25, 22, 115]
s = []
for i in range(15):    if(i%2!=0):        a[i] -= 30    else:        a[i], a[30-i] = a[30-i]+10, a[i]-20for i in range(31):    if(i%2 == 0):        a[i] ^= 0x13    else:        a[i] ^= 0x37for i in range(31):    print(chr(a[i]), end="")```
Flag: `n00bz{r3v_1s_s0_e4zy_r1ght??!!}`