Question

How to check if a string contain only two same repeating characters in C++

Answer 1

#include <bits/stdc++.h> 
  
using namespace std; 
  
bool contain_only_two_same_repeating_chars(string s) { 
    int len = s.length();
    if (len % 2 != 0) return false;
    for (int i = 0; i < len - 2; i++) { 
        if (s[i] != s[i + 2]) { 
            return false; 
        } 
    } 
    return true; 
} 
  
int main() 
{ 
    string s = "abababab"; 
    
    if (contain_only_two_same_repeating_chars(s)) 
        cout << "Yes"; 
    else
        cout << "No"; 
    
    return 0; 
} 
  
  
  
/*
run:
  
Yes
  
*/

 

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