问题标题: 1246我哪里错了？？？（我80分）求大神指点

http://judge.codingtang.com/problem/1246/

#include<cstdio>
#include<iostream>
using namespace std;
int main()
{
    int a,b,c;
    cin>>a;
    if(a%2==0||a%2==1)
    {
    b=a/2;
    if(a%4==0)
    {
    c=a/4;
    if(b==c)
    cout<<"0"<<" "<<" ";
    else
    printf("%.d %.d",c,b);  
    }
    else if(a%4==1||a%4==3)
    {
    c=(a/4)+(a%4)/2;
    if(b==c)
    cout<<'0'<<' '<<'0';
    else
    printf("%.d %.d",c,b);
    }
    else if(a%4==2)
    {
    c=(a/4)+1;
    if(b==c)
    cout<<'0'<<' '<<'0';
    else
    printf("%.d %.d",c,b);
    }
    }
    return 0;
}