You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
30 lines
627 B
30 lines
627 B
#include <bits/stdc++.h>
|
|
using namespace std;
|
|
|
|
int check(int x) {
|
|
// 转9进制
|
|
string res;
|
|
while (x) {
|
|
int a = x % 9;
|
|
res += to_string(a);
|
|
x /= 9;
|
|
}
|
|
// 每个数位都是奇数
|
|
for (int i = 0; i < res.size(); i++)
|
|
if ((res[i] - '0') % 2 == 0) return 0;
|
|
|
|
// 判断转完的9进制是不是回文数
|
|
string str = res;
|
|
reverse(str.begin(), str.end());
|
|
return str == res;
|
|
}
|
|
int main() {
|
|
int n, m;
|
|
cin >> n >> m;
|
|
|
|
int res = 0;
|
|
for (int i = n; i <= m; i++) res += check(i);
|
|
|
|
cout << res << endl;
|
|
return 0;
|
|
} |