golang为何都是wa

package main

import (
    "fmt"
    "sort"
)

type Result struct {
    Chinese int
    Math int
    Eng int
    Id int
    Sum int
}
type Results []Result

func (r Results) Len() int{
    return len(r)
}
func (r Results)Swap(i,j int)  {
    r[i],r[j]=r[j],r[i]
}
func (r Results)Less(i,j  int) bool  {
    if r[i].Sum != r[j].Sum{
        return r[i].Sum > r[j].Sum
    }
    if r[i].Chinese != r[j].Chinese{
        return r[i].Chinese > r[j].Chinese
    }

    return r[i].Id < r[j].Id
}

func main() {
    var n int
    fmt.Scanf("%d",&n)
    res := make(Results,n)

    for i := 0; i < n; i++ {
        var a,b, c int
        fmt.Scanf("%d %d %d",&a,&b,&c)
        res[i]=Result{
            Chinese: a,
            Eng:     c,
            Math:    b,
            Id:      i+1,
            Sum:  a+b+c,
        }

    }
    sort.Sort(res)
    for i :=0;i<5;i++{
        fmt.Printf("%d %d\n",res[i].Id,res[i].Sum)
    }

}