Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- #include <bits/stdc++.h>
- using namespace std;
- string nr;
- int cf[11],cmax,od=-1,c,nrod;
- bool canFormPalindrome(string str)
- {
- for(int i=0;str[i];++i)
- {
- ++cf[str[i]-'0'];
- if(str[i]-'0'>cmax)
- cmax=str[i]-'0';
- }
- int odd=0;
- for(int i=0;i<10;++i)
- {
- if (cf[i]&1)
- ++odd,od=i;
- if(odd > 1)
- return false;
- }
- return true;
- }
- int main()
- {
- ifstream f("palindrom3.in");
- f>>nr;
- f.close();
- ofstream g("palindrom3.out");
- if(nr.size()==1)
- {
- g<<nr;
- return 0;
- }
- if(canFormPalindrome(nr))
- {
- for(int i=cmax;i>=0;--i)
- {
- if(cf[i])
- for(int j=1;j<=cf[i]/2;++j)
- g<<i;
- if(i!=od)
- cf[i]/=2;
- else
- if(od>=0)
- cf[i]=cf[i]/2+1;
- }
- if(od>=0&&cf[od])
- g<<od,--cf[od];
- for(int i=0;i<=cmax;++i)
- {
- if(cf[i])
- for(int j=1;j<=cf[i];++j)
- g<<i;
- }
- }
- else
- g<<0;
- g.close();
- return 0;
- }
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement