> 将 $9$ 个数分成 $3$ 组
不能有重复的
by Yun_Mengxi_orz @ 2023-10-15 21:55:58
比如 `100 200 300` 就不符合要求，因为有 $0$
`123 246 369` 也不符合要求，因为有重复的数字
by Yun_Mengxi_orz @ 2023-10-15 21:56:50
```cpp
#include<bits/stdc++.h>
using namespace std;
bool check(int a, int b, int c) {
int used = 0, temp = 0;
temp = a;
while (temp) {
if(temp % 10 == 0) return false; // 排除包含数字0的情况
used |= (1 << (temp % 10));
temp /= 10;
}
temp = b;
while (temp) {
if(temp % 10 == 0) return false; // 排除包含数字0的情况
used |= (1 << (temp % 10));
temp /= 10;
}
temp = c;
while (temp) {
if(temp % 10 == 0) return false; // 排除包含数字0的情况
used |= (1 << (temp % 10));
temp /= 10;
}
return used == (1 << 10) - 2; // 检查是否所有的数字（1到9）都被使用了
}
int main(){
for (int i = 100; i <= 333; ++i) {
if (check(i, i * 2, i * 3)) {
printf("%d %d %d\n", i, i * 2, i * 3);
}
}
return 0;
}
```
by JYW2011 @ 2023-10-15 22:02:55
3Q
by MindustrySF @ 2023-10-17 09:38:53
```cpp
#include<iostream>
#include<algorithm>
using namespace std;
int main()
{
int A[] = { 1,2,3,4,5,6,7,8,9 };
int x1, x2, x3;
do
{
x1 = A[0] * 100 + A[1] * 10 + A[2];
x2 = A[3] * 100 + A[4] * 10 + A[5];
x3 = A[6] * 100 + A[7] * 10 + A[8];
if (x1 * 2 == x2 && x2 * 3 == x3 * 2 && x1 * 3 == x3)
{
cout << x1 <<" "<< x2 <<" "<< x3 << endl;
}
} while (next_permutation(A,A+9));
return 0;
}
by swuster27 @ 2024-02-24 14:04:18