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  1.    #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long
  4. #define du double
  5. #define endl '\n'
  6. #define IOS ios_base::sync_with_stdio(0);cin.tie(NULL);cout.tie(NULL);
  7.  
  8. int main() {
  9.     IOS;
  10.    int n;
  11.     cin>>n;
  12.     string s;
  13.     cin>>s;
  14.     map<char,int > mp;
  15.     for(int i=0;i<n;i++) {
  16.         mp[s[i]]++;
  17.     }
  18.     int l =0;
  19.     for(int i=0;i<n;i++) {
  20.         mp[s[i]]--;
  21.         if(mp[s[i]]==0) {
  22.             l=i;
  23.             break;
  24.         }
  25.     }
  26. int r=n-1;
  27.     for (int i=n-1;i>=0;i--) {
  28.         mp[s[i]]--;
  29.         if(mp[s[i]]==0) {
  30.             r=i;
  31.             break;
  32.         }
  33.     }
  34.  
  35.  
  36.     // cout <<l<< " "<<r<<endl;
  37.     cout <<r-l+1;;
  38.     return 0;
  39. }
Success #stdin #stdout 0.01s 5312KB
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stdin
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8
lralllrr
stdout
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5
https://ideone.com/c5RvUt
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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