考场程序95分，死定了

#include<bits/stdc++.h>
using namespace std;
int bb[]={0,0,0,0,1,0,0,1,2,0,1,2,0,1};
int cc[]={0,0,0,1,0,0,2,1,0,3,2,1,4,3};
int main()
{
    int n,a,b,c;
    cin>>n;
    if (n<3||n==5)
    {
        cout<<-1<<endl;
        return 0;
    }
    a=n/14;
    b=n/14;
    c=n/14;
    n%=14;
    if (!n)
    {
        cout<<a<<" "<<b<<" "<<c<<endl;
        return 0;
    }
    if (n<3||n==5)
    {
        n+=14;
        a--;
        b--;
        c--;
        if (n==15)
        {
            cout<<a<<" "<<b<<" "<<c+5<<endl;
        }
        if (n==16)
        {
            cout<<a<<" "<<b+1<<" "<<c+4<<endl;
        }
        if (n==19)  
        {
            cout<<a<<" "<<b+1<<" "<<c+5<<endl;
        }
        return 0;   
    }
    cout<<a<<" "<<b+bb[n]<<" "<<c+cc[n]<<endl;
    return 0;
}

Test1错了，其他AC

据检测为n=0时这玩意会直接输出-1，死定了