C :

#include<stdio.h>
void main()
{
	int m,n,a,b,c;//n为钱数，m为只数 
	scanf("%d%d",&n,&m);
	for(a=0;a<=n/5;a++){
		for(b=0;b<=m-a;b++){
			c=m-a-b;
			if(a+b+c==m&&5*a+3*b+c/3==n&&c%3==0)
				printf("%d %d %d\n",a,b,c);
		} 
	}						 
} 

C++ :

#include <iostream>
using namespace std;
int main(){
    int a,b,c,d,n,m;
    cin>>n>>m;
    for(c=0;c<=n;c=c+3){
        d=c/3;
        for(b=0;b<=n;b++){
            for(a=0;a<=n;a++){
                if(a+b+c==m&&5*a+3*b+d==n){
                   cout<<a<<" "<<b<<" "<<c<<endl;   
                }
            }
        }
    }
}

Python :

s = input().split()
n = int(s[0])
m = int(s[1])
for i in range(0,m):
    for j in range(0,m):
        for k in range(0,m+1):
            if i + j + 3 * k == m and 5 * i + 3 * j + 1 * k == n:
                print(i, end=' ')
                print(j, end=' ')
                print(3*k)
print()