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- #include <iostream>
- #include <string>
- using namespace std;
- string to7(int a) {
- string ans;
- while (a > 0) {
- ans = to_string(a % 7) + ans;
- a /= 7;
- }
- return ans;
- }
- int main() {
- string s;
- cin >> s;
- if ((int)s[0] <= 90 && (int)s[0] >= 65) {
- string str = to_string((int)s[0]);
- s += str;
- }
- if((int)s[s.size() - 1] <= 57 && (int)s[s.size() - 1] >= 48) {
- string ascii = to_string((int)s[s.size() - 1]);
- s = ascii + s;
- }
- for (int i = 0; i < s.size(); i++) {
- cout << to7((int)s[i]);
- }
- return 0;
- }
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