#include<bits/stdc++.h>
using namespace std;
const int mxN = 2*5e5+5;
int pref[mxN], a[mxN], sig[mxN], n, k;
int rs(int i, int j) {
if(i <= j) return pref[j] - pref[i-1];
return rs(i, n) + rs(1, j);
}
signed main() {
//freopen("hac.in", "r", stdin);
//freopen("hac.out", "w", stdout);
cin >> n;
k = (n + 1) / 2;
for(int i = 1; i <= n; i++) cin >> a[i];
for(int i = 1; i <= n; i++) pref[i] = a[i] + pref[i-1];
for(int i = 1; i <= n; i++) {
if(i+k-1 <= n) sig[i] = rs(i, i+k-1);
else sig[i] = rs(i, i+k-1-n);
}
for(int i = 1; i <= n; i++) sig[i+n] = sig[i];
//for(int i = 1; i <= 2*n; i++) cerr << sig[i] << '\n';
deque<int> st;
int res = INT_MIN;
for(int i = 1; i <= 2*n; i++) {
while(st.size() and sig[i] <= sig[st.back()]) st.pop_back();
st.push_back(i);
while(st.size() and st.front() + k - 1 < i) st.pop_front();
if(st.size() && i >= k) res = max(res, sig[st.front()]);
}
cout << res << '\n';
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
308 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
308 KB |
Output is correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Correct |
0 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
304 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
308 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
308 KB |
Output is correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Correct |
0 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
304 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
308 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
340 KB |
Output is correct |
| 23 |
Correct |
2 ms |
344 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
2 ms |
340 KB |
Output is correct |
| 26 |
Correct |
2 ms |
340 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
1 ms |
312 KB |
Output is correct |
| 29 |
Correct |
0 ms |
212 KB |
Output is correct |
| 30 |
Correct |
1 ms |
340 KB |
Output is correct |
| 31 |
Correct |
2 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
1 ms |
212 KB |
Output is correct |
| 3 |
Correct |
2 ms |
320 KB |
Output is correct |
| 4 |
Correct |
26 ms |
1852 KB |
Output is correct |
| 5 |
Correct |
46 ms |
4180 KB |
Output is correct |
| 6 |
Correct |
65 ms |
5256 KB |
Output is correct |
| 7 |
Correct |
75 ms |
6488 KB |
Output is correct |
| 8 |
Correct |
149 ms |
10192 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
212 KB |
Output is correct |
| 2 |
Correct |
0 ms |
308 KB |
Output is correct |
| 3 |
Correct |
1 ms |
212 KB |
Output is correct |
| 4 |
Correct |
1 ms |
212 KB |
Output is correct |
| 5 |
Correct |
1 ms |
212 KB |
Output is correct |
| 6 |
Correct |
0 ms |
212 KB |
Output is correct |
| 7 |
Correct |
1 ms |
212 KB |
Output is correct |
| 8 |
Correct |
1 ms |
212 KB |
Output is correct |
| 9 |
Correct |
1 ms |
212 KB |
Output is correct |
| 10 |
Correct |
1 ms |
308 KB |
Output is correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Correct |
0 ms |
212 KB |
Output is correct |
| 13 |
Correct |
1 ms |
212 KB |
Output is correct |
| 14 |
Correct |
1 ms |
212 KB |
Output is correct |
| 15 |
Correct |
1 ms |
212 KB |
Output is correct |
| 16 |
Correct |
1 ms |
212 KB |
Output is correct |
| 17 |
Correct |
1 ms |
304 KB |
Output is correct |
| 18 |
Correct |
1 ms |
212 KB |
Output is correct |
| 19 |
Correct |
1 ms |
308 KB |
Output is correct |
| 20 |
Correct |
1 ms |
340 KB |
Output is correct |
| 21 |
Correct |
1 ms |
212 KB |
Output is correct |
| 22 |
Correct |
1 ms |
340 KB |
Output is correct |
| 23 |
Correct |
2 ms |
344 KB |
Output is correct |
| 24 |
Correct |
1 ms |
340 KB |
Output is correct |
| 25 |
Correct |
2 ms |
340 KB |
Output is correct |
| 26 |
Correct |
2 ms |
340 KB |
Output is correct |
| 27 |
Correct |
1 ms |
212 KB |
Output is correct |
| 28 |
Correct |
1 ms |
312 KB |
Output is correct |
| 29 |
Correct |
0 ms |
212 KB |
Output is correct |
| 30 |
Correct |
1 ms |
340 KB |
Output is correct |
| 31 |
Correct |
2 ms |
340 KB |
Output is correct |
| 32 |
Correct |
1 ms |
212 KB |
Output is correct |
| 33 |
Correct |
1 ms |
212 KB |
Output is correct |
| 34 |
Correct |
2 ms |
320 KB |
Output is correct |
| 35 |
Correct |
26 ms |
1852 KB |
Output is correct |
| 36 |
Correct |
46 ms |
4180 KB |
Output is correct |
| 37 |
Correct |
65 ms |
5256 KB |
Output is correct |
| 38 |
Correct |
75 ms |
6488 KB |
Output is correct |
| 39 |
Correct |
149 ms |
10192 KB |
Output is correct |
| 40 |
Correct |
3 ms |
468 KB |
Output is correct |
| 41 |
Correct |
5 ms |
596 KB |
Output is correct |
| 42 |
Correct |
8 ms |
960 KB |
Output is correct |
| 43 |
Correct |
51 ms |
4300 KB |
Output is correct |
| 44 |
Correct |
130 ms |
10196 KB |
Output is correct |
| 45 |
Correct |
22 ms |
2132 KB |
Output is correct |
| 46 |
Correct |
73 ms |
6224 KB |
Output is correct |
| 47 |
Correct |
124 ms |
10232 KB |
Output is correct |
| 48 |
Correct |
117 ms |
10444 KB |
Output is correct |
| 49 |
Correct |
114 ms |
10736 KB |
Output is correct |
| 50 |
Correct |
97 ms |
10624 KB |
Output is correct |
