#include<queue>
#include<math.h>
#include<stdio.h>
#include<iostream>
#include<vector>
#include<iomanip>
#include<string.h>
#include<algorithm>
#include<cmath>
#include<cstdio>
#include<utility>
#include<cstring>
#include<stack>
#include<fstream>
#include<string>
using namespace std;
typedef long long ll;
const int N = 1e5 + 10;
const int INF = 0x3f3f3f3f;
void solve()
{
    int Q;
    cin >> Q;
    while ( Q-- )
	{
        ll a;
        cin >> a;
        if ( a == 0 )
		{
            cout << "0 0\n";
            continue;
        }
        ll mx = -1 , my = -1;
        for ( ll y = 0 ; 5 * y <= a ; ++y )
		{
            ll rem = a - 5 * y;
            if ( rem >= 0 && rem % 3 == 0 )
			{
                mx = rem / 3;
                break;
            }
        }
        for ( ll x = 0 ; 3 * x <= a ; ++x )
		{
            ll rem = a - 3 * x;
            if ( rem >= 0 && rem % 5 == 0 )
			{
                my = rem / 5;
                break;
            }
        }
        if ( mx == -1 || my == -1 )
		{
            cout << "-1\n";
        }
		else
		{
            cout << mx << " " << my << "\n";
        }
    }
}
int main()
{
    solve();
    return 0;
}

麻烦各位大佬指正一下： （非AC代码，勿复制）

#include <bits/stdc++.h>
using namespace std;
const int N=1e7+10;
const int INF=0x3f3f3f3f;
int t;
long long n;
int main()
{
	cin>>t;
	while(t--)
	{
		cin>>n;
		long long els=n%3;
		if(els==1)
		{
			els=(n-10)/3;
		}
		else if(els==2)
		{
			els=(n-5)/3;
		}
		else if(els==0)
		{
			els=n/3;
		}
		long long els2=n%5;
		if(els2==1)
		{
			els2=(n-6)/5;
		}
		else if(els2==2)
		{
			els2=(n-12)/5;
		}
		else if(els2==3)
		{
			els2=(n-18)/5;
		}
		else if(els2==4)
		{
			els2=(n-9)/5;
		}
		else if(els2==0)
		{
			els2=n/5;
		}
		if(els<=0)
		{
			cout<<0<<" ";
		}
		else
		{
			cout<<els<<" ";
		}
		if(els2<=0)
		{
			cout<<0<<endl;
		}
		else
		{
			cout<<els2<<endl;
		}
	}
	return 0;
}