hhhhhhhhhhhhhhhh谢谢你

解题思路:

注意事项:

参考代码:

#include<iostream>

using namespace std;

int main()

{

bool flag = 0;

int n;

cin >> n;

int a, b, c, d, e, f;

for (a = 1; a <= 9; a++)

for (b = 0; b <= 9; b++)

for (c = 0; c <= 9; c++)

for (d = 0; d <= 9; d++)

for (e = 0; e <= 9; e++)

if (a + b + c + d + e == n && a == e && b == d)

cout << a << b << c << d << e << endl, flag = 1;

for (a = 1; a <= 9; a++)

for (b = 0; b <= 9; b++)

for (c = 0; c <= 9; c++)

for (d = 0; d <= 9; d++)

for (e = 0; e <= 9; e++)

for (f = 1; f <= 9; f++)

if (a + b + c + d + e + f == n && a == f && b == e && c == d)

cout << a << b << c << d << e << f << endl, flag = 1;

if (!flag)cout << -1;

return 0;

}