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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. typedef long long ll;
  5.  
  6. int main() {
  7.     string s;
  8.     ll k;
  9.  
  10.     cin >> s >> k;
  11.  
  12.     ll n = s.size();
  13.     ll l = 0;
  14.     ll ans = 0;
  15.     ll stt = 0;
  16.  
  17.     multiset<char> st;
  18.  
  19.     for(ll r = 0; r < n; r++) {
  20.         st.insert(s[r]);
  21.  
  22.         while(*st.rbegin() - *st.begin() > k) {
  23.             st.erase(st.find(s[l]));
  24.             l++;
  25.         }
  26.  
  27.         if(r - l + 1 > ans) {
  28.             ans = r - l + 1;
  29.             stt = l;
  30.         }
  31.     }
  32.  
  33.     cout << ans << '\n';
  34.     cout << s.substr(stt, ans) << '\n';
  35.  
  36.     return 0;
  37. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin 
abcdef
2
stdout 
3
abc
https://ideone.com/uxvkVR
2
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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