#include <bits/stdc++.h>
#define MOD 1000000007
#define ff first
#define ss second
#define N 500005
typedef long long ll;
const ll mx = 1e9 + 100005;
using namespace std;
ll a[N], M[N], H[N], sum[N], mn[4 * N];
ll solve(ll id, ll l, ll r, ll val){
ll m = l + r >> 1;
if(l == r) return l;
if(mn[id * 2 + 1] <= val) return solve(id * 2 + 1, m + 1, r, val);
else return solve(id * 2, l, m, val);
}
void update(ll id, ll l, ll r, ll pos, ll val){
if(l == r){
mn[id] = val;
return;
}
ll m = l + r >> 1;
if(m >= pos) update(id * 2, l, m, pos, val);
else update(id * 2 + 1, m + 1, r, pos, val);
mn[id] = min(mn[id * 2], mn[id * 2 + 1]);
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
ll n;
cin >> n;
for(ll i = 0; i <= n; i++){
update(1, 0, n, i, 1e18);
}
for(ll i = 1; i <= n; i++){
cin >> a[i];
sum[i] = sum[i - 1] + a[i];
ll id = solve(1, 0, n, sum[i]);
H[i] = H[id] + 1;
update(1, 0, n, i, sum[i] - sum[id] + sum[i]);
}
cout << H[n];
}
Compilation message
segments.cpp: In function 'll solve(ll, ll, ll, ll)':
segments.cpp:12:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
12 | ll m = l + r >> 1;
| ~~^~~
segments.cpp: In function 'void update(ll, ll, ll, ll, ll)':
segments.cpp:23:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
23 | ll m = l + r >> 1;
| ~~^~~
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
0 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
0 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
332 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
0 ms |
332 KB |
Output is correct |
11 |
Correct |
1 ms |
332 KB |
Output is correct |
12 |
Correct |
0 ms |
332 KB |
Output is correct |
13 |
Correct |
0 ms |
332 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
1 ms |
332 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
0 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
0 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
332 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
0 ms |
332 KB |
Output is correct |
11 |
Correct |
1 ms |
332 KB |
Output is correct |
12 |
Correct |
0 ms |
332 KB |
Output is correct |
13 |
Correct |
0 ms |
332 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
1 ms |
332 KB |
Output is correct |
16 |
Correct |
1 ms |
332 KB |
Output is correct |
17 |
Correct |
0 ms |
332 KB |
Output is correct |
18 |
Correct |
1 ms |
316 KB |
Output is correct |
19 |
Correct |
1 ms |
328 KB |
Output is correct |
20 |
Correct |
1 ms |
332 KB |
Output is correct |
21 |
Correct |
1 ms |
332 KB |
Output is correct |
22 |
Correct |
1 ms |
332 KB |
Output is correct |
23 |
Correct |
1 ms |
332 KB |
Output is correct |
24 |
Correct |
1 ms |
316 KB |
Output is correct |
25 |
Correct |
1 ms |
332 KB |
Output is correct |
26 |
Correct |
1 ms |
332 KB |
Output is correct |
27 |
Correct |
1 ms |
332 KB |
Output is correct |
28 |
Correct |
1 ms |
332 KB |
Output is correct |
29 |
Correct |
1 ms |
332 KB |
Output is correct |
30 |
Correct |
1 ms |
332 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
0 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
0 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
332 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
0 ms |
332 KB |
Output is correct |
11 |
Correct |
1 ms |
332 KB |
Output is correct |
12 |
Correct |
0 ms |
332 KB |
Output is correct |
13 |
Correct |
0 ms |
332 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
1 ms |
332 KB |
Output is correct |
16 |
Correct |
1 ms |
332 KB |
Output is correct |
17 |
Correct |
0 ms |
332 KB |
Output is correct |
18 |
Correct |
1 ms |
316 KB |
Output is correct |
19 |
Correct |
1 ms |
328 KB |
Output is correct |
20 |
Correct |
1 ms |
332 KB |
Output is correct |
21 |
Correct |
1 ms |
332 KB |
Output is correct |
22 |
Correct |
1 ms |
332 KB |
Output is correct |
23 |
Correct |
1 ms |
332 KB |
Output is correct |
24 |
Correct |
1 ms |
316 KB |
Output is correct |
25 |
Correct |
1 ms |
332 KB |
Output is correct |
26 |
Correct |
1 ms |
332 KB |
Output is correct |
27 |
Correct |
1 ms |
332 KB |
Output is correct |
28 |
Correct |
1 ms |
332 KB |
Output is correct |
29 |
Correct |
1 ms |
332 KB |
Output is correct |
30 |
Correct |
1 ms |
332 KB |
Output is correct |
31 |
Correct |
1 ms |
468 KB |
Output is correct |
32 |
Correct |
1 ms |
476 KB |
Output is correct |
33 |
Correct |
1 ms |
460 KB |
Output is correct |
34 |
Correct |
2 ms |
460 KB |
Output is correct |
35 |
Correct |
1 ms |
460 KB |
Output is correct |
36 |
Correct |
2 ms |
464 KB |
Output is correct |
37 |
Correct |
1 ms |
452 KB |
Output is correct |
38 |
Correct |
1 ms |
332 KB |
Output is correct |
39 |
Correct |
1 ms |
460 KB |
Output is correct |
40 |
Correct |
2 ms |
460 KB |
Output is correct |
41 |
Correct |
1 ms |
460 KB |
Output is correct |
42 |
Correct |
1 ms |
460 KB |
Output is correct |
43 |
Correct |
2 ms |
460 KB |
Output is correct |
44 |
Correct |
1 ms |
464 KB |
Output is correct |
45 |
Correct |
2 ms |
464 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
0 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
0 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
332 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
0 ms |
332 KB |
Output is correct |
11 |
Correct |
1 ms |
332 KB |
Output is correct |
12 |
Correct |
0 ms |
332 KB |
Output is correct |
13 |
Correct |
0 ms |
332 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
1 ms |
332 KB |
Output is correct |
16 |
Correct |
1 ms |
332 KB |
Output is correct |
17 |
Correct |
0 ms |
332 KB |
Output is correct |
18 |
Correct |
1 ms |
316 KB |
Output is correct |
19 |
Correct |
1 ms |
328 KB |
Output is correct |
20 |
Correct |
1 ms |
332 KB |
Output is correct |
21 |
Correct |
1 ms |
332 KB |
Output is correct |
22 |
Correct |
1 ms |
332 KB |
Output is correct |
23 |
Correct |
1 ms |
332 KB |
Output is correct |
24 |
Correct |
1 ms |
316 KB |
Output is correct |
25 |
Correct |
1 ms |
332 KB |
Output is correct |
26 |
Correct |
1 ms |
332 KB |
Output is correct |
27 |
Correct |
1 ms |
332 KB |
Output is correct |
28 |
Correct |
1 ms |
332 KB |
Output is correct |
29 |
Correct |
1 ms |
332 KB |
Output is correct |
30 |
Correct |
1 ms |
332 KB |
Output is correct |
31 |
Correct |
1 ms |
468 KB |
Output is correct |
32 |
Correct |
1 ms |
476 KB |
Output is correct |
33 |
Correct |
1 ms |
460 KB |
Output is correct |
34 |
Correct |
2 ms |
460 KB |
Output is correct |
35 |
Correct |
1 ms |
460 KB |
Output is correct |
36 |
Correct |
2 ms |
464 KB |
Output is correct |
37 |
Correct |
1 ms |
452 KB |
Output is correct |
38 |
Correct |
1 ms |
332 KB |
Output is correct |
39 |
Correct |
1 ms |
460 KB |
Output is correct |
40 |
Correct |
2 ms |
460 KB |
Output is correct |
41 |
Correct |
1 ms |
460 KB |
Output is correct |
42 |
Correct |
1 ms |
460 KB |
Output is correct |
43 |
Correct |
2 ms |
460 KB |
Output is correct |
44 |
Correct |
1 ms |
464 KB |
Output is correct |
45 |
Correct |
2 ms |
464 KB |
Output is correct |
46 |
Correct |
30 ms |
5092 KB |
Output is correct |
47 |
Correct |
32 ms |
5168 KB |
Output is correct |
48 |
Correct |
37 ms |
5512 KB |
Output is correct |
49 |
Correct |
37 ms |
5568 KB |
Output is correct |
50 |
Correct |
38 ms |
5664 KB |
Output is correct |
51 |
Correct |
38 ms |
5664 KB |
Output is correct |
52 |
Correct |
19 ms |
3012 KB |
Output is correct |
53 |
Correct |
10 ms |
1836 KB |
Output is correct |
54 |
Correct |
38 ms |
4892 KB |
Output is correct |
55 |
Correct |
37 ms |
5700 KB |
Output is correct |
56 |
Correct |
33 ms |
5184 KB |
Output is correct |
57 |
Correct |
33 ms |
5040 KB |
Output is correct |
58 |
Correct |
31 ms |
5064 KB |
Output is correct |
59 |
Correct |
34 ms |
5228 KB |
Output is correct |
60 |
Correct |
34 ms |
5320 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
0 ms |
336 KB |
Output is correct |
2 |
Correct |
0 ms |
332 KB |
Output is correct |
3 |
Correct |
1 ms |
332 KB |
Output is correct |
4 |
Correct |
0 ms |
332 KB |
Output is correct |
5 |
Correct |
1 ms |
332 KB |
Output is correct |
6 |
Correct |
0 ms |
332 KB |
Output is correct |
7 |
Correct |
1 ms |
332 KB |
Output is correct |
8 |
Correct |
0 ms |
332 KB |
Output is correct |
9 |
Correct |
0 ms |
332 KB |
Output is correct |
10 |
Correct |
0 ms |
332 KB |
Output is correct |
11 |
Correct |
1 ms |
332 KB |
Output is correct |
12 |
Correct |
0 ms |
332 KB |
Output is correct |
13 |
Correct |
0 ms |
332 KB |
Output is correct |
14 |
Correct |
0 ms |
332 KB |
Output is correct |
15 |
Correct |
1 ms |
332 KB |
Output is correct |
16 |
Correct |
1 ms |
332 KB |
Output is correct |
17 |
Correct |
0 ms |
332 KB |
Output is correct |
18 |
Correct |
1 ms |
316 KB |
Output is correct |
19 |
Correct |
1 ms |
328 KB |
Output is correct |
20 |
Correct |
1 ms |
332 KB |
Output is correct |
21 |
Correct |
1 ms |
332 KB |
Output is correct |
22 |
Correct |
1 ms |
332 KB |
Output is correct |
23 |
Correct |
1 ms |
332 KB |
Output is correct |
24 |
Correct |
1 ms |
316 KB |
Output is correct |
25 |
Correct |
1 ms |
332 KB |
Output is correct |
26 |
Correct |
1 ms |
332 KB |
Output is correct |
27 |
Correct |
1 ms |
332 KB |
Output is correct |
28 |
Correct |
1 ms |
332 KB |
Output is correct |
29 |
Correct |
1 ms |
332 KB |
Output is correct |
30 |
Correct |
1 ms |
332 KB |
Output is correct |
31 |
Correct |
1 ms |
468 KB |
Output is correct |
32 |
Correct |
1 ms |
476 KB |
Output is correct |
33 |
Correct |
1 ms |
460 KB |
Output is correct |
34 |
Correct |
2 ms |
460 KB |
Output is correct |
35 |
Correct |
1 ms |
460 KB |
Output is correct |
36 |
Correct |
2 ms |
464 KB |
Output is correct |
37 |
Correct |
1 ms |
452 KB |
Output is correct |
38 |
Correct |
1 ms |
332 KB |
Output is correct |
39 |
Correct |
1 ms |
460 KB |
Output is correct |
40 |
Correct |
2 ms |
460 KB |
Output is correct |
41 |
Correct |
1 ms |
460 KB |
Output is correct |
42 |
Correct |
1 ms |
460 KB |
Output is correct |
43 |
Correct |
2 ms |
460 KB |
Output is correct |
44 |
Correct |
1 ms |
464 KB |
Output is correct |
45 |
Correct |
2 ms |
464 KB |
Output is correct |
46 |
Correct |
30 ms |
5092 KB |
Output is correct |
47 |
Correct |
32 ms |
5168 KB |
Output is correct |
48 |
Correct |
37 ms |
5512 KB |
Output is correct |
49 |
Correct |
37 ms |
5568 KB |
Output is correct |
50 |
Correct |
38 ms |
5664 KB |
Output is correct |
51 |
Correct |
38 ms |
5664 KB |
Output is correct |
52 |
Correct |
19 ms |
3012 KB |
Output is correct |
53 |
Correct |
10 ms |
1836 KB |
Output is correct |
54 |
Correct |
38 ms |
4892 KB |
Output is correct |
55 |
Correct |
37 ms |
5700 KB |
Output is correct |
56 |
Correct |
33 ms |
5184 KB |
Output is correct |
57 |
Correct |
33 ms |
5040 KB |
Output is correct |
58 |
Correct |
31 ms |
5064 KB |
Output is correct |
59 |
Correct |
34 ms |
5228 KB |
Output is correct |
60 |
Correct |
34 ms |
5320 KB |
Output is correct |
61 |
Correct |
152 ms |
22148 KB |
Output is correct |
62 |
Correct |
161 ms |
22212 KB |
Output is correct |
63 |
Correct |
160 ms |
22592 KB |
Output is correct |
64 |
Correct |
175 ms |
24772 KB |
Output is correct |
65 |
Correct |
182 ms |
25224 KB |
Output is correct |
66 |
Correct |
180 ms |
25028 KB |
Output is correct |
67 |
Correct |
144 ms |
21720 KB |
Output is correct |
68 |
Correct |
72 ms |
11092 KB |
Output is correct |
69 |
Correct |
156 ms |
21204 KB |
Output is correct |
70 |
Correct |
192 ms |
25156 KB |
Output is correct |
71 |
Correct |
164 ms |
22300 KB |
Output is correct |
72 |
Correct |
160 ms |
22524 KB |
Output is correct |
73 |
Correct |
167 ms |
23260 KB |
Output is correct |
74 |
Correct |
169 ms |
23496 KB |
Output is correct |
75 |
Correct |
170 ms |
23552 KB |
Output is correct |