CCF 2019 03_1大中小问题 请教大神们为啥我这个结果老是0分

#include <stdio.h>
int main()
{

    int a[100000],n,high,low,m2,m;
    float mid;
    scanf("%d",&n);

    for(int i=1;i<=n;i++)
        scanf("%d",&a[i]);

    if(n==1)
    {
        printf("%d %d %d",a[1],a[1],a[1]);
        return 0;
    }
    if(a[1]<a[n])
    {
        high=a[n];
        low=a[1];
    }
    else
    {
            high=a[1];
        low=a[n];
    }
    if(n%2==1)
    {

        m=n/2+1;
        m2=a[m];
    }
    else
    {
        m=n/2;
        if(a[m]%2==a[m+1]%2)
        {
                m2=(a[m]+a[m+1])/2;
        }
        else
        {
            mid=(float)(a[m]+a[m+1])/2;
            printf("%d %.1f %d",high,mid,low);
        return 0;
        }
    }
        printf("%d %d %d",high,m2,low);
        return 0;
}