OJ Board

Please help me.
I really have no idea why I'm getting WA.
I tried removing and placing back the blank link at the end of the output but both returned as WA
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <algorithm>
#include <iostream>

int compare (const void * a, const void ...

Could somebody help me please. I do not get what is wrong with my code.
I tried removing and putting the blank link after the output but both came out as WA
#include <stdio.h>
#include <string.h>

int main ()
{
int test = 0;
int tc = 0;
int num = 0;
int grades[1000];
int i=0;
scanf("%d ...

Could somebody help me? why do i get getting WA

#include <iostream>
using namespace std;

int main()
{
int test=0;
int a,b;
cin >> test;
for( int i=0; i<test ;i++)
{
cin >> a >> b;
int j=a;
int sum=0;
for(j=a;j<=b;j++)
{
if(j%2)
sum=sum+j;
}
if(i!=test-1)
cout << "Case " << i+1 ...

Could somebody help me with my code? I keep Getting WA :(

#include <iostream>
using namespace std;

int ls(int *arr, int s, int q)
{
int i=0;
for(i=0;i<s;i++)
{
if(arr[i]==q)
return i;
}
return -1;
}

int main()
{
int x,i;
int num[3005];
int copy[3005];
while(cin.good())
{
i=0;x=0 ...