Please help!!!Tell me what is wrong in my algo???Help to orgonise input!Here is my code:
#include <iostream.h>
int main()
{
    const int N=50000;
    int x[N],y[N];
    bool s;
    int i,k;
    int a,b;
    cin>>a;
    for(i=0;i<a;i++)
    {
        cin>>x[i];
    }
    cin>>b;
    for(i=0;i<b;i++)
    {
        cin>>y[i];
    }
    for(i=0;i<a;i++)
    {
        for(k=0;k<b;k++)
        {
            if(x[i]+y[k]==10000)
            {
                s=true;
            }
            if(x[i]+y[i]!=10000)
            {
                s=false;
            }
        }
    }
    if(s=true)
    {
        cout<<"YES"<<endl;
    }
    if(s=false)
    {
        cout<<"NO"<<endl;
    }
    return 0;

}

You must finish your iterations and print "YES", if an appropriate pair of numbers is found.
Now your program outputs the value of the 's' for the last pair, x[a-1] and y[b-1].

But this algo can be substantially optimized.