fork download 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define ll long long int
  4. const int M = 1e9 + 7;
  5.  
  6. // 4th Sep Amazon SDE 1
  7.  
  8. int main()
  9. {
  10.     ios_base::sync_with_stdio(false);
  11.     cin.tie(NULL);
  12.     string s;
  13.     cin >> s;
  14.     unordered_map<char, int> freq;
  15.     map<vector<int>, int> mp;
  16.     int ans = 0;
  17.     mp[{0, 0, 0}] = 1;
  18.     for (auto it : s)
  19.     {
  20.         freq[it]++;
  21.         int x1 = freq['a'] - freq['b'];
  22.         int x2 = freq['c'] - freq['d'];
  23.         int x3 = freq['u'] - freq['t'];
  24.         ans += mp[{x1, x2, x3}];
  25.         mp[{x1, x2, x3}]++;
  26.     }
  27.     cout << ans << endl;
  28.     return 0;
  29. }
  30.  
Success #stdin #stdout 0.01s 5304KB
comments (?)
stdin 
abbacdutt
stdout 
10
https://ideone.com/KyIBxy
language:
C++14 (gcc 8.3)
created:
4 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!