[lead game]PLEASE HELP ME TO FIND MY MISTAKE

#include<iostream>
using namespace std;

long int a[100000][2];
int main()
{
    int x;
    cin>>x;
    int large=0,index=0;
    for(int i=1;i<=x;++i)
    {
            for(int j=1;j<=2;++j)
            {
                  cin>>a[i][j];
            }
            if(a[i][1]<a[i][2])
            {
                   a[i][2]=a[i][2]-a[i][1];
                   a[i][1]=2;
            }
            else
            {
                     a[i][2]=a[i][1]-a[i][2];
                     a[i][1]=1;
            }




    }
    large=a[1][2];  
    index=a[1][1];     
    for(int i=1,j=2;i<x;++i)
    {
         if(large<a[i][2])
         {
             large=a[i][2];
             index=a[i][1];
         }
    }
    cout<<index<<"  "<<large<<endl;
return 0;
}