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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5.   int n;
  6.   cin >> n;
  7.   vector<int> v(n);
  8.   for (int i = 0; i < n; ++i) {
  9.     cin >> v[i];
  10.   }
  11.   long long l = 0, r = 0;
  12.   long long count = 0;
  13.   set<int> st;
  14.   while (r < n) {
  15.     while (st.count(v[r])) {
  16.       st.erase(v[l]);
  17.       l++;
  18.     }
  19.     st.insert(v[r]);
  20.     count += (r - l + 1);
  21.     r++;
  22.   }
  23.   cout << count;
  24. }
Success #stdin #stdout 0s 5268KB
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Standard input is empty
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5452
https://ideone.com/HIDN8q
language:
C++14 (gcc 8.3)
created:
2 days ago
visibility:
public

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