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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. #define fastio() ios_base::sync_with_stdio(0);cin.tie(0);cout.tie()
  4.  
  5.  
  6.  
  7. using namespace std;
  8. typedef long long ll;
  9.  
  10.  
  11. void File(){
  12.     #ifndef ONLINE_JUDGE
  13.         freopen("input.txt", "r", stdin);
  14.         freopen("output.txt", "w", stdout);
  15.     #endif
  16. }
  17. ll largestRectangleArea(vector <ll> heights) {
  18.     stack<int> st;
  19.  
  20.     int n=heights.size(),i=n-1;
  21.  
  22.     ll area,mxarea=-1,top;
  23.  
  24.  
  25.  
  26.     while (i >= 0) {
  27.         if (st.empty() || heights[i] >= heights[st.top()]) {
  28.             st.push(i--);
  29.         } else {
  30.             top = st.top();
  31.             st.pop();
  32.             area = heights[top] * (st.empty() ? n-i-1 : st.top()-i-1);
  33.             mxarea = max(mxarea, area);
  34.         }
  35.     }
  36.     while (!st.empty()) {
  37.         top = st.top();
  38.         st.pop();
  39.         area = heights[top] * (st.empty() ? n : st.top() - i - 1);
  40.         mxarea = max(mxarea, area);
  41.     }
  42.     return mxarea;
  43. }
  44. int solve() {  
  45.     int n;
  46.     cin>>n;
  47.     vector<ll> v(n);
  48.     for(int i=0;i<n;i++){
  49.         cin>>v[i];
  50.     }
  51.     cout<<largestRectangleArea(v)<<endl;
  52.  
  53.  
  54.     return 0;
  55. }
  56.  
  57. int main() {
  58.     fastio();
  59.     File();
  60.     int32_t t=1;
  61.     cin>>t;
  62.     for(auto i=t;i--;){
  63.         solve();
  64.     }
  65. }
  66.  
Success #stdin #stdout 0s 5284KB
comments (?)
stdin
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2
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2 1 4 5 1 3 3
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1000 1000 1000 1000
stdout
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8
4000
https://ideone.com/HUXpvs
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
secret

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