#include <bits/stdc++.h>
using namespace std;
using ll = long long;
vector<ll> st;
int fnd(int nd, int l, int r, int x, int y, ll vl) {
if (r < x || y < l || vl < st[nd]) return -1;
if (l == r) return l;
int ch = nd << 1, md = (l + r) >> 1, res = fnd(ch + 1, md + 1, r, x, y, vl);
return (~res ? res : fnd(ch, l, md, x, y, vl));
}
ll upd(int nd, int l, int r, int x, ll vl) {
if (r < x || x < l) return st[nd];
if (l == r) return st[nd] = vl;
int ch = nd << 1, md = (l + r) >> 1;
return st[nd] = min(upd(ch, l, md, x, vl), upd(ch + 1, md + 1, r, x, vl));
}
int main() {
ios::sync_with_stdio(false); cin.tie(nullptr);
int n;
cin >> n;
vector<int> a(n + 1);
for (int i = 1; i <= n; i++)
cin >> a[i];
vector<ll> p(n + 1);
for (int i = 1; i <= n; i++)
p[i] = p[i - 1] + a[i];
st.assign(n << 2, 0);
vector<ll> dp(n + 1), v(n + 1);
for (int i = 1; i <= n; i++) {
int x = fnd(1, 0, n, 0, i - 1, p[i]);
dp[i] = dp[x] + 1;
upd(1, 0, n, i, (p[i] << 1) - p[x]);
}
cout << dp[n];
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
1 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
1 ms |
564 KB |
Output is correct |
5 |
Correct |
1 ms |
336 KB |
Output is correct |
6 |
Correct |
1 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
504 KB |
Output is correct |
8 |
Correct |
1 ms |
336 KB |
Output is correct |
9 |
Correct |
1 ms |
336 KB |
Output is correct |
10 |
Correct |
1 ms |
336 KB |
Output is correct |
11 |
Correct |
1 ms |
336 KB |
Output is correct |
12 |
Correct |
1 ms |
336 KB |
Output is correct |
13 |
Correct |
1 ms |
336 KB |
Output is correct |
14 |
Correct |
1 ms |
336 KB |
Output is correct |
15 |
Correct |
1 ms |
336 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
1 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
1 ms |
564 KB |
Output is correct |
5 |
Correct |
1 ms |
336 KB |
Output is correct |
6 |
Correct |
1 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
504 KB |
Output is correct |
8 |
Correct |
1 ms |
336 KB |
Output is correct |
9 |
Correct |
1 ms |
336 KB |
Output is correct |
10 |
Correct |
1 ms |
336 KB |
Output is correct |
11 |
Correct |
1 ms |
336 KB |
Output is correct |
12 |
Correct |
1 ms |
336 KB |
Output is correct |
13 |
Correct |
1 ms |
336 KB |
Output is correct |
14 |
Correct |
1 ms |
336 KB |
Output is correct |
15 |
Correct |
1 ms |
336 KB |
Output is correct |
16 |
Correct |
1 ms |
336 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
1 ms |
500 KB |
Output is correct |
19 |
Correct |
1 ms |
336 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
21 |
Correct |
1 ms |
336 KB |
Output is correct |
22 |
Correct |
1 ms |
336 KB |
Output is correct |
23 |
Correct |
1 ms |
336 KB |
Output is correct |
24 |
Correct |
1 ms |
336 KB |
Output is correct |
25 |
Correct |
2 ms |
336 KB |
Output is correct |
26 |
Correct |
1 ms |
336 KB |
Output is correct |
27 |
Correct |
1 ms |
336 KB |
Output is correct |
28 |
Correct |
1 ms |
336 KB |
Output is correct |
29 |
Correct |
1 ms |
336 KB |
Output is correct |
30 |
Correct |
1 ms |
336 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
1 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
1 ms |
564 KB |
Output is correct |
5 |
Correct |
1 ms |
336 KB |
Output is correct |
6 |
Correct |
1 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
504 KB |
Output is correct |
8 |
Correct |
1 ms |
336 KB |
Output is correct |
9 |
Correct |
1 ms |
336 KB |
Output is correct |
10 |
Correct |
1 ms |
336 KB |
Output is correct |
11 |
Correct |
1 ms |
336 KB |
Output is correct |
12 |
Correct |
1 ms |
336 KB |
Output is correct |
13 |
Correct |
1 ms |
336 KB |
Output is correct |
14 |
Correct |
1 ms |
336 KB |
Output is correct |
15 |
Correct |
1 ms |
336 KB |
Output is correct |
16 |
Correct |
1 ms |
336 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
1 ms |
500 KB |
Output is correct |
19 |
Correct |
1 ms |
336 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
21 |
Correct |
1 ms |
336 KB |
Output is correct |
22 |
Correct |
1 ms |
336 KB |
Output is correct |
23 |
Correct |
1 ms |
336 KB |
Output is correct |
24 |
Correct |
1 ms |
336 KB |
Output is correct |
25 |
Correct |
2 ms |
336 KB |
Output is correct |
26 |
Correct |
1 ms |
336 KB |
Output is correct |
27 |
Correct |
1 ms |
336 KB |
Output is correct |
28 |
Correct |
1 ms |
336 KB |
Output is correct |
29 |
Correct |
1 ms |
336 KB |
Output is correct |
30 |
Correct |
1 ms |
336 KB |
Output is correct |
31 |
Correct |
2 ms |
592 KB |
Output is correct |
32 |
Correct |
2 ms |
592 KB |
Output is correct |
33 |
Correct |
2 ms |
592 KB |
Output is correct |
34 |
Correct |
2 ms |
592 KB |
Output is correct |
35 |
Correct |
2 ms |
760 KB |
Output is correct |
36 |
Correct |
2 ms |
592 KB |
Output is correct |
37 |
Correct |
2 ms |
592 KB |
Output is correct |
38 |
Correct |
2 ms |
592 KB |
Output is correct |
39 |
Correct |
2 ms |
592 KB |
Output is correct |
40 |
Correct |
2 ms |
592 KB |
Output is correct |
41 |
Correct |
2 ms |
592 KB |
Output is correct |
42 |
Correct |
2 ms |
592 KB |
Output is correct |
43 |
Correct |
2 ms |
592 KB |
Output is correct |
44 |
Correct |
1 ms |
592 KB |
Output is correct |
45 |
Correct |
2 ms |
592 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
1 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
1 ms |
564 KB |
Output is correct |
5 |
Correct |
1 ms |
336 KB |
Output is correct |
6 |
Correct |
1 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
504 KB |
Output is correct |
8 |
Correct |
1 ms |
336 KB |
Output is correct |
9 |
Correct |
1 ms |
336 KB |
Output is correct |
10 |
Correct |
1 ms |
336 KB |
Output is correct |
11 |
Correct |
1 ms |
336 KB |
Output is correct |
12 |
Correct |
1 ms |
336 KB |
Output is correct |
13 |
Correct |
1 ms |
336 KB |
Output is correct |
14 |
Correct |
1 ms |
336 KB |
Output is correct |
15 |
Correct |
1 ms |
336 KB |
Output is correct |
16 |
Correct |
1 ms |
336 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
1 ms |
500 KB |
Output is correct |
19 |
Correct |
1 ms |
336 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
21 |
Correct |
1 ms |
336 KB |
Output is correct |
22 |
Correct |
1 ms |
336 KB |
Output is correct |
23 |
Correct |
1 ms |
336 KB |
Output is correct |
24 |
Correct |
1 ms |
336 KB |
Output is correct |
25 |
Correct |
2 ms |
336 KB |
Output is correct |
26 |
Correct |
1 ms |
336 KB |
Output is correct |
27 |
Correct |
1 ms |
336 KB |
Output is correct |
28 |
Correct |
1 ms |
336 KB |
Output is correct |
29 |
Correct |
1 ms |
336 KB |
Output is correct |
30 |
Correct |
1 ms |
336 KB |
Output is correct |
31 |
Correct |
2 ms |
592 KB |
Output is correct |
32 |
Correct |
2 ms |
592 KB |
Output is correct |
33 |
Correct |
2 ms |
592 KB |
Output is correct |
34 |
Correct |
2 ms |
592 KB |
Output is correct |
35 |
Correct |
2 ms |
760 KB |
Output is correct |
36 |
Correct |
2 ms |
592 KB |
Output is correct |
37 |
Correct |
2 ms |
592 KB |
Output is correct |
38 |
Correct |
2 ms |
592 KB |
Output is correct |
39 |
Correct |
2 ms |
592 KB |
Output is correct |
40 |
Correct |
2 ms |
592 KB |
Output is correct |
41 |
Correct |
2 ms |
592 KB |
Output is correct |
42 |
Correct |
2 ms |
592 KB |
Output is correct |
43 |
Correct |
2 ms |
592 KB |
Output is correct |
44 |
Correct |
1 ms |
592 KB |
Output is correct |
45 |
Correct |
2 ms |
592 KB |
Output is correct |
46 |
Correct |
33 ms |
6480 KB |
Output is correct |
47 |
Correct |
34 ms |
6748 KB |
Output is correct |
48 |
Correct |
33 ms |
6992 KB |
Output is correct |
49 |
Correct |
35 ms |
7248 KB |
Output is correct |
50 |
Correct |
33 ms |
7248 KB |
Output is correct |
51 |
Correct |
37 ms |
7248 KB |
Output is correct |
52 |
Correct |
19 ms |
3664 KB |
Output is correct |
53 |
Correct |
12 ms |
2384 KB |
Output is correct |
54 |
Correct |
35 ms |
6480 KB |
Output is correct |
55 |
Correct |
37 ms |
7248 KB |
Output is correct |
56 |
Correct |
29 ms |
6736 KB |
Output is correct |
57 |
Correct |
31 ms |
6736 KB |
Output is correct |
58 |
Correct |
34 ms |
6736 KB |
Output is correct |
59 |
Correct |
34 ms |
6924 KB |
Output is correct |
60 |
Correct |
33 ms |
6736 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
336 KB |
Output is correct |
2 |
Correct |
1 ms |
336 KB |
Output is correct |
3 |
Correct |
1 ms |
336 KB |
Output is correct |
4 |
Correct |
1 ms |
564 KB |
Output is correct |
5 |
Correct |
1 ms |
336 KB |
Output is correct |
6 |
Correct |
1 ms |
336 KB |
Output is correct |
7 |
Correct |
1 ms |
504 KB |
Output is correct |
8 |
Correct |
1 ms |
336 KB |
Output is correct |
9 |
Correct |
1 ms |
336 KB |
Output is correct |
10 |
Correct |
1 ms |
336 KB |
Output is correct |
11 |
Correct |
1 ms |
336 KB |
Output is correct |
12 |
Correct |
1 ms |
336 KB |
Output is correct |
13 |
Correct |
1 ms |
336 KB |
Output is correct |
14 |
Correct |
1 ms |
336 KB |
Output is correct |
15 |
Correct |
1 ms |
336 KB |
Output is correct |
16 |
Correct |
1 ms |
336 KB |
Output is correct |
17 |
Correct |
1 ms |
336 KB |
Output is correct |
18 |
Correct |
1 ms |
500 KB |
Output is correct |
19 |
Correct |
1 ms |
336 KB |
Output is correct |
20 |
Correct |
1 ms |
336 KB |
Output is correct |
21 |
Correct |
1 ms |
336 KB |
Output is correct |
22 |
Correct |
1 ms |
336 KB |
Output is correct |
23 |
Correct |
1 ms |
336 KB |
Output is correct |
24 |
Correct |
1 ms |
336 KB |
Output is correct |
25 |
Correct |
2 ms |
336 KB |
Output is correct |
26 |
Correct |
1 ms |
336 KB |
Output is correct |
27 |
Correct |
1 ms |
336 KB |
Output is correct |
28 |
Correct |
1 ms |
336 KB |
Output is correct |
29 |
Correct |
1 ms |
336 KB |
Output is correct |
30 |
Correct |
1 ms |
336 KB |
Output is correct |
31 |
Correct |
2 ms |
592 KB |
Output is correct |
32 |
Correct |
2 ms |
592 KB |
Output is correct |
33 |
Correct |
2 ms |
592 KB |
Output is correct |
34 |
Correct |
2 ms |
592 KB |
Output is correct |
35 |
Correct |
2 ms |
760 KB |
Output is correct |
36 |
Correct |
2 ms |
592 KB |
Output is correct |
37 |
Correct |
2 ms |
592 KB |
Output is correct |
38 |
Correct |
2 ms |
592 KB |
Output is correct |
39 |
Correct |
2 ms |
592 KB |
Output is correct |
40 |
Correct |
2 ms |
592 KB |
Output is correct |
41 |
Correct |
2 ms |
592 KB |
Output is correct |
42 |
Correct |
2 ms |
592 KB |
Output is correct |
43 |
Correct |
2 ms |
592 KB |
Output is correct |
44 |
Correct |
1 ms |
592 KB |
Output is correct |
45 |
Correct |
2 ms |
592 KB |
Output is correct |
46 |
Correct |
33 ms |
6480 KB |
Output is correct |
47 |
Correct |
34 ms |
6748 KB |
Output is correct |
48 |
Correct |
33 ms |
6992 KB |
Output is correct |
49 |
Correct |
35 ms |
7248 KB |
Output is correct |
50 |
Correct |
33 ms |
7248 KB |
Output is correct |
51 |
Correct |
37 ms |
7248 KB |
Output is correct |
52 |
Correct |
19 ms |
3664 KB |
Output is correct |
53 |
Correct |
12 ms |
2384 KB |
Output is correct |
54 |
Correct |
35 ms |
6480 KB |
Output is correct |
55 |
Correct |
37 ms |
7248 KB |
Output is correct |
56 |
Correct |
29 ms |
6736 KB |
Output is correct |
57 |
Correct |
31 ms |
6736 KB |
Output is correct |
58 |
Correct |
34 ms |
6736 KB |
Output is correct |
59 |
Correct |
34 ms |
6924 KB |
Output is correct |
60 |
Correct |
33 ms |
6736 KB |
Output is correct |
61 |
Correct |
181 ms |
31704 KB |
Output is correct |
62 |
Correct |
179 ms |
31560 KB |
Output is correct |
63 |
Correct |
207 ms |
32072 KB |
Output is correct |
64 |
Correct |
206 ms |
34268 KB |
Output is correct |
65 |
Correct |
176 ms |
34632 KB |
Output is correct |
66 |
Correct |
207 ms |
34632 KB |
Output is correct |
67 |
Correct |
160 ms |
27600 KB |
Output is correct |
68 |
Correct |
79 ms |
13896 KB |
Output is correct |
69 |
Correct |
190 ms |
30792 KB |
Output is correct |
70 |
Correct |
219 ms |
34632 KB |
Output is correct |
71 |
Correct |
162 ms |
31560 KB |
Output is correct |
72 |
Correct |
169 ms |
32072 KB |
Output is correct |
73 |
Correct |
177 ms |
32604 KB |
Output is correct |
74 |
Correct |
176 ms |
33096 KB |
Output is correct |
75 |
Correct |
171 ms |
33100 KB |
Output is correct |