正经题解

桶+枚举+特判+数字分离

#include<bits/stdc++.h>
using namespace std;
int main(){
    for(int x=1;x<=9;x++){
        for(int y=1;y<=9;y++){
            for(int z=1;z<=9;z++){
                bool flag=true;
                if(x==y||x==z||y==z){
                    flag=false;
                }else{
                    int sum=x*100+y*10+z;
                    if(sum>333)flag=false;
                    int t1=sum*2;
                    int t2=sum*3;
                    int a[100]={0};//桶数组
                    a[x]++;
                    a[y]++;
                    a[z]++;
                    a[t1/100]++;
                    a[(t1%100)/10]++;
                    a[t1%10]++;
                    a[t2/100]++;
                    a[(t2%100)/10]++;
                    a[t2%10]++;//取位
                    if(t1/100==0||(t1%100)/10==0||t1%10==0||t2/100==0||(t2%100)/10==0||t2%10==0){//特判
                        flag=false;
                    }
                    for(int i=1;i<=9;i++){
                        if(a[i]>1)flag=false;
                    }
                }
                
                if(flag==true){
                    cout<<x*100+y*10+z<<" "<<(x*100+y*10+z)*2<<" "<<(x*100+y*10+z)*3<<endl;
                }
            }
        }
    }
    return 0;
}