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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. int main() {
  6.     string s;
  7.     cout << "Enter a string: ";
  8.     cin >> s;
  9.  
  10.     int count[26] = {0};
  11.  
  12.     for(int i = 0; i < s.length(); i++) {
  13.         count[s[i] - 'a']++;
  14.     }
  15.  
  16.     for(int i = 0; i < s.length(); i++) {
  17.         if(count[s[i] - 'a'] == 1) {
  18.             cout << i << endl;
  19.             return 0;
  20.         }
  21.     }
  22.  
  23.     cout << -1 << endl;
  24.     return 0;
  25. }
  26.  
Success #stdin #stdout 0.01s 5288KB
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Enter a string: 0
https://ideone.com/nypey0
language:
C++ (gcc 8.3)
created:
3 hours ago
visibility:
public

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