The Lead game: Wrong Answer

I dont know what is wrong in the code.. Tried for many inputs. Runs fine on ideone.

  #include <iostream>
    #include<cmath>
    using namespace std;

int main() {
    int t;
    int x1,y1,min=0,max=0,a;
    scanf("%d",&t);
    for(int i=1;i<=t;i++)
    {
        scanf("%d%d",&x1,&y1);
        a=x1-y1;
        if(a>=max)
        {   max=a;
        }
        if(min>=a)
        {   min=a;
        }
    }
    if(abs(max)>abs(min))
        printf("1 %d",max);
    else
        printf("2 %d",-min);
    return 0;
}