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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.     string str;
  6.     cin>>str;
  7.     int k;
  8.     cin>>k;
  9.     int n=str.size();
  10.     vector<int> dp(n);
  11.     dp[0]=1;
  12.     for(int i=1;i<n;i++){
  13.     	if(abs(str[i]-str[i-1])<=k){
  14.     		dp[i]=dp[i-1]+1;
  15.     	}else{
  16.     		dp[i]=1;
  17.     	}
  18.     }
  19.     int maxInd =0;
  20.     int maxLen= 1;
  21.     for(int i=1;i<n;i++){
  22.     	if(dp[i]>maxLen){
  23.     		maxLen = dp[i];
  24.     		maxInd = i;
  25.     	}
  26.     }
  27.     cout<<str.substr(maxInd-maxLen+1,maxLen);
  28.     return 0;
  29. }//RRRRR
Success #stdin #stdout 0s 5284KB
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ababbacaabbbb
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stdout
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ababba
https://ideone.com/KHO12c
language:
C++ (gcc 8.3)
created:
5 days ago
visibility:
public

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