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发布时间:2019-03-07

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??????????????????????????????????????????????????Kadane???????????????????O(N)????????N?

????

Kadane??????????????????????current_max??????max_sum????????????????????????????????????current_max??????????????O(N)????????????

????

#include 
using namespace std;int main() { int N; while (cin >> N) { int* a = new int[N]; for (int i = 0; i < N; ++i) { cin >> a[i]; } int max_sum = a[0]; int current_max = a[0]; for (int i = 1; i < N; ++i) { current_max = max(a[i], current_max + a[i]); max_sum = max(max_sum, current_max); } cout << max_sum << endl; delete[] a; } return 0;}

????

  • ???????????N?????N????????a?
  • ?????????max_sum?current_max??????????
  • ??????????????????current_max??????????????max_sum???????
  • ?????????????max_sum?????????
  • ?????????????????????O(N)???????????N??1,000,000????

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