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  1. /*Code by HsonW, 11/2 NH-Hue. Just a newbie <3*/
  2. /*tai vi anh yeu duoi*/
  3. #include<bits/stdc++.h>
  4. using namespace std;
  5. using int64=long long;
  6. #define ll long long
  7. const int MOD=1e9+7;
  8. const int MAX=1e6+100;
  9. typedef pair<int,int> ii;
  10. typedef pair<ll,int> li;
  11. typedef pair<int,ll> il;
  12. typedef pair<ll,ll> LL;
  13. int n;
  14. signed main(){
  15.     #define name "HsonW"
  16.     ios::sync_with_stdio(0);
  17.     cin.tie(NULL);
  18.     if(fopen(name ".inp", "r")){
  19.         freopen(name ".inp", "r", stdin);
  20.         freopen(name ".out", "w", stdout);
  21.     }
  22.     stack<il>st;
  23.     cin >>n;
  24.     int ans=0;
  25.     for(int i=1;i<=n;i++){
  26.         int cnt=1;
  27.         int a;
  28.         cin >>a;
  29.         while(!st.empty() && st.top().first<=a){
  30.             ans+=st.top().second;
  31.             if(st.top().first==a)cnt+=st.top().second;
  32.             st.pop();
  33.         }
  34.         if(!st.empty()) ans++;
  35.         st.push({a,cnt});
  36.     }
  37.     cout <<ans;
  38.  
  39. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/lCad9k
language:
C++14 (gcc 8.3)
created:
4 days ago
visibility:
public

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