本题两种方法

#include<bits/stdc++.h>
using namespace std;

int main()
{	//a:
    //cout << "192 384 576\n" ;
    //cout << "219 438 657\n" ;
    //cout << "273 546 819\n" ;
    //cout << "327 654 981\n";
    
    
    //b:
	int ar[9];
    for (int a = 123; a <= 987 / 3; a++)
    {
        int b = a * 2;
        int c = a * 3;
        int abc=a*1000000+b*1000+c;
        char s[10];
        sprintf(s, "%d", abc);
        sort(s,s+9);
        if(atoi(s)==123456789)
        	cout<<a<<' '<<b<<' '<<c<<endl;
    }
    return 0;
}