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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int countLongestAtoZLength(const string& S) {
  5.     int n = S.size();
  6.     int first_A = -1, last_Z = -1;
  7.  
  8.     for (int i = 0; i < n; i++) {
  9.         if (S[i] == 'A') {
  10.             first_A = i;
  11.             break;
  12.         }
  13.     }
  14.  
  15.     for (int i = n - 1; i >= 0; i--) {
  16.         if (S[i] == 'Z') {
  17.             last_Z = i;
  18.             break;
  19.         }
  20.     }
  21.  
  22.     if (first_A != -1 && last_Z != -1 && first_A < last_Z) {
  23.         return last_Z - first_A + 1;
  24.     }
  25.  
  26.     return 0;
  27. }
  28.  
  29. int main() {
  30.     string S;
  31.     getline(cin, S);
  32.  
  33.     int ans = countLongestAtoZLength(S);
  34.     cout << ans << endl;
  35.  
  36.     return 0;
  37. }
Success #stdin #stdout 0.01s 5316KB
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https://ideone.com/1upHNc
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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