#include <bits/stdc++.h>
using namespace std;
const int MAXN = 5e5 + 11;
const int LGN = 21;
unsigned int a[MAXN * 3], s[MAXN * 3], b[MAXN * 2];
struct SparseTable{
int st[LGN][MAXN * 2];
void init(int n, unsigned int* a, int (*g)(int, int)){
f = g;
for(int i = 0; i < n; i++) st[0][i] = a[i];
for(int j = 1; j < LGN; j++){
for(int i = 0; i <= n - (1 << j); i++){
st[j][i] = f(st[j - 1][i], st[j - 1][i + (1 << j - 1)]);
}
}
}
int qry(int l, int r){
int d = __lg(r - l + 1);
return f(st[d][l], st[d][r - (1 << d) + 1]);
}
int (*f)(int, int);
} ST;
int32_t main(){
int n; cin >> n;
for(int i = 0; i < n; i++) cin >> a[i];
for(int i = 0; i < n; i++) a[i + n * 2] = a[i + n] = a[i];
for(int i = 0; i < n * 3; i++) s[i + 1] = s[i] + a[i];
for(int i = 0; i < n * 2; i++) b[i] = s[i + (n + 1) / 2] - s[i];
ST.init(n * 2, b, [](int a, int b){ return min(a, b); });
int ans = 0;
for(int i = 0; i < n; i++){
ans = max(ans, ST.qry(i, i + (n + 1) / 2 - 1));
}
cout << ans << endl;
}
Compilation message
hac.cpp: In member function 'void SparseTable::init(int, unsigned int*, int (*)(int, int))':
hac.cpp:15:54: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
15 | st[j][i] = f(st[j - 1][i], st[j - 1][i + (1 << j - 1)]);
| ~~^~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
0 ms |
308 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
0 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Correct |
1 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
0 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
0 ms |
308 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
0 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Correct |
1 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
0 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
468 KB |
Output is correct |
| 21 |
Correct |
1 ms |
468 KB |
Output is correct |
| 22 |
Correct |
2 ms |
724 KB |
Output is correct |
| 23 |
Correct |
3 ms |
1088 KB |
Output is correct |
| 24 |
Correct |
1 ms |
724 KB |
Output is correct |
| 25 |
Correct |
2 ms |
980 KB |
Output is correct |
| 26 |
Correct |
2 ms |
980 KB |
Output is correct |
| 27 |
Correct |
1 ms |
340 KB |
Output is correct |
| 28 |
Correct |
1 ms |
340 KB |
Output is correct |
| 29 |
Correct |
0 ms |
340 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1084 KB |
Output is correct |
| 31 |
Correct |
2 ms |
980 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
340 KB |
Output is correct |
| 2 |
Correct |
1 ms |
340 KB |
Output is correct |
| 3 |
Correct |
2 ms |
980 KB |
Output is correct |
| 4 |
Correct |
23 ms |
13260 KB |
Output is correct |
| 5 |
Correct |
54 ms |
34512 KB |
Output is correct |
| 6 |
Correct |
69 ms |
44496 KB |
Output is correct |
| 7 |
Correct |
84 ms |
54068 KB |
Output is correct |
| 8 |
Correct |
152 ms |
92252 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
340 KB |
Output is correct |
| 2 |
Correct |
0 ms |
340 KB |
Output is correct |
| 3 |
Correct |
0 ms |
340 KB |
Output is correct |
| 4 |
Correct |
0 ms |
308 KB |
Output is correct |
| 5 |
Correct |
1 ms |
340 KB |
Output is correct |
| 6 |
Correct |
1 ms |
340 KB |
Output is correct |
| 7 |
Correct |
1 ms |
340 KB |
Output is correct |
| 8 |
Correct |
1 ms |
340 KB |
Output is correct |
| 9 |
Correct |
1 ms |
340 KB |
Output is correct |
| 10 |
Correct |
0 ms |
340 KB |
Output is correct |
| 11 |
Correct |
1 ms |
340 KB |
Output is correct |
| 12 |
Correct |
1 ms |
340 KB |
Output is correct |
| 13 |
Correct |
1 ms |
340 KB |
Output is correct |
| 14 |
Correct |
1 ms |
340 KB |
Output is correct |
| 15 |
Correct |
1 ms |
340 KB |
Output is correct |
| 16 |
Correct |
0 ms |
340 KB |
Output is correct |
| 17 |
Correct |
1 ms |
340 KB |
Output is correct |
| 18 |
Correct |
1 ms |
340 KB |
Output is correct |
| 19 |
Correct |
1 ms |
340 KB |
Output is correct |
| 20 |
Correct |
1 ms |
468 KB |
Output is correct |
| 21 |
Correct |
1 ms |
468 KB |
Output is correct |
| 22 |
Correct |
2 ms |
724 KB |
Output is correct |
| 23 |
Correct |
3 ms |
1088 KB |
Output is correct |
| 24 |
Correct |
1 ms |
724 KB |
Output is correct |
| 25 |
Correct |
2 ms |
980 KB |
Output is correct |
| 26 |
Correct |
2 ms |
980 KB |
Output is correct |
| 27 |
Correct |
1 ms |
340 KB |
Output is correct |
| 28 |
Correct |
1 ms |
340 KB |
Output is correct |
| 29 |
Correct |
0 ms |
340 KB |
Output is correct |
| 30 |
Correct |
2 ms |
1084 KB |
Output is correct |
| 31 |
Correct |
2 ms |
980 KB |
Output is correct |
| 32 |
Correct |
0 ms |
340 KB |
Output is correct |
| 33 |
Correct |
1 ms |
340 KB |
Output is correct |
| 34 |
Correct |
2 ms |
980 KB |
Output is correct |
| 35 |
Correct |
23 ms |
13260 KB |
Output is correct |
| 36 |
Correct |
54 ms |
34512 KB |
Output is correct |
| 37 |
Correct |
69 ms |
44496 KB |
Output is correct |
| 38 |
Correct |
84 ms |
54068 KB |
Output is correct |
| 39 |
Correct |
152 ms |
92252 KB |
Output is correct |
| 40 |
Correct |
4 ms |
1728 KB |
Output is correct |
| 41 |
Correct |
5 ms |
3308 KB |
Output is correct |
| 42 |
Correct |
8 ms |
4908 KB |
Output is correct |
| 43 |
Correct |
59 ms |
35276 KB |
Output is correct |
| 44 |
Correct |
168 ms |
92376 KB |
Output is correct |
| 45 |
Correct |
26 ms |
16948 KB |
Output is correct |
| 46 |
Correct |
84 ms |
53988 KB |
Output is correct |
| 47 |
Correct |
145 ms |
92236 KB |
Output is correct |
| 48 |
Correct |
158 ms |
92612 KB |
Output is correct |
| 49 |
Correct |
136 ms |
91636 KB |
Output is correct |
| 50 |
Correct |
135 ms |
91696 KB |
Output is correct |
