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  1. #include <iostream>
  2. #include <stack>
  3. using namespace std;
  4.  
  5. int* stockSpan(int* P, int n) {
  6.     stack<int> st;
  7.     int* spans = new int[n];
  8.  
  9.     for (int i = 0; i < n; ++i) {
  10.         while (!st.empty() && P[i] >= P[st.top()]) {
  11.             st.pop();
  12.         }
  13.  
  14.         spans[i] = st.empty() ? (i + 1) : (i - st.top());
  15.         st.push(i);
  16.     }
  17.  
  18.     return spans;
  19. }
  20.  
  21. int main() {
  22.     int prices[] = {100, 80, 60, 70, 60, 75, 85};
  23.     int n = sizeof(prices) / sizeof(prices[0]);
  24.     int* spans = stockSpan(prices, n);
  25.  
  26.     cout << "Stock prices: ";
  27.     for (int i = 0; i < n; ++i) {
  28.         cout << prices[i] << " ";
  29.     }
  30.     cout << endl;
  31.  
  32.     cout << "Stock spans for each day: ";
  33.     for (int i = 0; i < n; ++i) {
  34.         cout << spans[i] << " ";
  35.     }
  36.     cout << endl;
  37.  
  38.     delete[] spans; 
  39.     return 0;
  40. }
Success #stdin #stdout 0s 5280KB
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stdin
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Standard input is empty
stdout
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Stock prices: 100 80 60 70 60 75 85 
Stock spans for each day: 1 1 1 2 1 4 6
https://ideone.com/IrLE1G
language:
C++ 4.3.2 (gcc-4.3.2)
created:
36 days ago
visibility:
public

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