제출 #676498

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
676498	2022-12-31 03:48:37	penguin133	Hacker (BOI15_hac)	C++17	100 / 100	59 ms	20404 KiB

hac

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#include <bits/stdc++.h>
using namespace std;
#define int long long
int dp[1000005], B[1000005], P[1000005], S[500005];
deque<int>dq;
main(){
  ios::sync_with_stdio(0);cin.tie(0);
  int n;cin >> n;
  for(int i=1;i<=n;i++)cin >> B[i];
  for(int i=n+1;i<=n*2;i++)B[i] = B[i-n];
  for(int i=1;i<=2*n;i++)P[i] = P[i-1] + B[i];
  int x = n / 2;
  for(int i=1;i<=n-x;i++){
    while(!dq.empty() && P[dq.back() + x-1] - P[dq.back()-1] < P[i+x-1] - P[i-1])dq.pop_back();
    dq.push_back(i);
  }
  int maxi = 1e9;
  for(int i=1;i<=n;i++){
    while(!dq.empty() && P[dq.back() + x-1] - P[dq.back()-1] < P[n+i-1] - P[n+i-x-1])dq.pop_back();
    if(!dq.empty() && dq.front() == i)dq.pop_front();
    dq.push_back(n+i-x);
    maxi = min(maxi, P[dq[0] + x - 1] - P[dq[0] - 1]);
  }
  cout << P[n] - maxi;
}
 
 
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컴파일 시 표준 에러 (stderr) 메시지

hac.cpp:6:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    6 | main(){
      | ^~~~

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 40 / 40