제출 #1127675

#제출 시각아이디문제언어결과실행 시간메모리
1127675MuhammetHacker (BOI15_hac)C++20
100 / 100
274 ms31648 KiB
#include "bits/stdc++.h" using namespace std; #define SZ(s) (int)s.size() #define ll long long int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); int n; cin >> n; vector <ll> a(n), b, p(2*n+1,0); for(int i = 0; i < n; i++){ cin >> a[i]; b.push_back(a[i]); } for(auto i : a) b.push_back(i); ll ans = 0, k = (n+1)/2, s = 0; multiset <ll> st; p[0] = b[0]; for(int i = 1; i < 2*n; i++){ p[i] = p[i-1] + b[i]; } for(int i = k-1; i < 2*n; i++){ st.insert(p[i]-((i-k < 0) ? 0 : p[i-k])); if(SZ(st) == k){ ans = max(ans, *st.begin()); st.erase(st.find(p[i-k+1]-((i-2*k+1 < 0) ? 0 : p[i-2*k+1]))); } } cout << ans; }
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