#include <bits/stdc++.h>
using namespace std;
const int MN = 500005, sz = 1048576, inf = int(2e9) + 5;
struct Seg{
int dat[2 * sz];
void ini(){ fill(dat + 1, dat + 2 * sz, inf); }
void upd(int x, int v){
x += sz; dat[x] = v;
for(x /= 2; x; x /= 2) dat[x] = min(dat[2 * x], dat[2 * x + 1]);
}
int get(int s, int e){
int ret = inf;
for(s += sz, e += sz; s <= e; s /= 2, e /= 2){
if(s % 2 == 1) ret = min(ret, dat[s++]);
if(e % 2 == 0) ret = min(ret, dat[e--]);
}
return ret;
}
} S;
int n, m, s[2 * MN], ans;
int main(){
scanf("%d", &n);
m = (n + 1) / 2;
for(int i = 1; i <= n; i++){
scanf("%d", s + i);
s[n + i] = s[i];
}
S.ini();
for(int i = 2; i <= 2 * n; i++) s[i] += s[i - 1];
for(int i = 0; i + m <= 2 * n; i++) S.upd(i, s[i + m] - s[i]);
for(int i = m - 1; i + m <= 2 * n; i++) ans = max(ans, S.get(i - m + 1, i));
printf("%d\n", ans);
}
Compilation message
hac.cpp: In function 'int main()':
hac.cpp:25:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &n);
^
hac.cpp:28:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", s + i);
^
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 2 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 3 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 4 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 5 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 6 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 7 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 8 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 9 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 10 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 11 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 12 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 13 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 14 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 15 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 16 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 17 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 18 |
Correct |
3 ms |
14112 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 2 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 3 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 4 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 5 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 6 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 7 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 8 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 9 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 10 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 11 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 12 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 13 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 14 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 15 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 16 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 17 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 18 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 19 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 20 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 21 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 22 |
Correct |
6 ms |
14112 KB |
Output is correct |
| 23 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 24 |
Correct |
6 ms |
14112 KB |
Output is correct |
| 25 |
Correct |
6 ms |
14112 KB |
Output is correct |
| 26 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 27 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 28 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 29 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 30 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 31 |
Correct |
3 ms |
14112 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 2 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 3 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 4 |
Correct |
33 ms |
14112 KB |
Output is correct |
| 5 |
Correct |
66 ms |
14112 KB |
Output is correct |
| 6 |
Correct |
103 ms |
14112 KB |
Output is correct |
| 7 |
Correct |
99 ms |
14112 KB |
Output is correct |
| 8 |
Correct |
183 ms |
14112 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 2 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 3 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 4 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 5 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 6 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 7 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 8 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 9 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 10 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 11 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 12 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 13 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 14 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 15 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 16 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 17 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 18 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 19 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 20 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 21 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 22 |
Correct |
6 ms |
14112 KB |
Output is correct |
| 23 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 24 |
Correct |
6 ms |
14112 KB |
Output is correct |
| 25 |
Correct |
6 ms |
14112 KB |
Output is correct |
| 26 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 27 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 28 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 29 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 30 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 31 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 32 |
Correct |
0 ms |
14112 KB |
Output is correct |
| 33 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 34 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 35 |
Correct |
33 ms |
14112 KB |
Output is correct |
| 36 |
Correct |
66 ms |
14112 KB |
Output is correct |
| 37 |
Correct |
103 ms |
14112 KB |
Output is correct |
| 38 |
Correct |
99 ms |
14112 KB |
Output is correct |
| 39 |
Correct |
183 ms |
14112 KB |
Output is correct |
| 40 |
Correct |
3 ms |
14112 KB |
Output is correct |
| 41 |
Correct |
6 ms |
14112 KB |
Output is correct |
| 42 |
Correct |
13 ms |
14112 KB |
Output is correct |
| 43 |
Correct |
79 ms |
14112 KB |
Output is correct |
| 44 |
Correct |
183 ms |
14112 KB |
Output is correct |
| 45 |
Correct |
33 ms |
14112 KB |
Output is correct |
| 46 |
Correct |
109 ms |
14112 KB |
Output is correct |
| 47 |
Correct |
186 ms |
14112 KB |
Output is correct |
| 48 |
Correct |
179 ms |
14112 KB |
Output is correct |
| 49 |
Correct |
166 ms |
14112 KB |
Output is correct |
| 50 |
Correct |
163 ms |
14112 KB |
Output is correct |
