fork(1) download
copy 
  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main() {
  6.     char s[52];  
  7.     cin >> s;  
  8.  
  9.     int first[26], second[26];  
  10.     for (int i = 0; i < 26; i++) {
  11.         first[i] = -1;
  12.         second[i] = -1;
  13.     }
  14.  
  15.  
  16.     for (int i = 0; i < 52; i++) {
  17.         int index = s[i] - 'A';
  18.         if (first[index] == -1) {
  19.             first[index] = i;  
  20.         } else {
  21.             second[index] = i; 
  22.         }
  23.     }
  24.  
  25.     int dem = 0; // 
  26.  
  27.     for (int i = 0; i < 26; i++) {
  28.         for (int j = i + 1; j < 26; j++) {
  29.             int x1 = first[i], y1 = second[i];
  30.             int x2 = first[j], y2 = second[j];
  31.  
  32.             if ((x1 < x2 && y1 > y2) || (x1 > x2 && y1 < y2)) {
  33.                 dem++;
  34.             }
  35.         }
  36.     }
  37.  
  38.     cout << dem << endl; 
  39.  
  40.     return 0;
  41. }
  42.  
Success #stdin #stdout 0s 5292KB
comments (?)
stdin
copy 
ABCCABDDEEFFGGHHIIJJKKLLMMNNOOPPQQRRSSTTUUVVWWXXYYZZ
stdout
copy 
2
https://ideone.com/EdtkQW
language:
C++ (gcc 8.3)
created:
7 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!