#include<bits/stdc++.h>
using namespace std;
long long sum[500005],a[500005],m,k,n,bef[500005],cursum,dp[500005],l,r,ans;
int main(){
cin>>n;
for(k=1;k<=n;k++){
cin>>a[k];
sum[k]=sum[k-1]+a[k];
}
for(k=1;k<=n;k++){
bef[k]=max(bef[k],bef[k-1]);
cursum=sum[k]-sum[bef[k]];
dp[k]=dp[bef[k]]+1;
l=k; r=n; ans=0;
while(l<=r){
int mid=(l+r)/2;
if(sum[mid]-sum[k]>=cursum){
r=mid-1; ans=mid;
}
else l=mid+1;
}
bef[ans]=k;
}
cout<<dp[n];
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
4 ms |
384 KB |
Output is correct |
3 |
Correct |
5 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
4 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
4 ms |
384 KB |
Output is correct |
8 |
Correct |
5 ms |
384 KB |
Output is correct |
9 |
Correct |
4 ms |
384 KB |
Output is correct |
10 |
Correct |
5 ms |
384 KB |
Output is correct |
11 |
Correct |
4 ms |
384 KB |
Output is correct |
12 |
Correct |
4 ms |
384 KB |
Output is correct |
13 |
Correct |
5 ms |
384 KB |
Output is correct |
14 |
Correct |
4 ms |
384 KB |
Output is correct |
15 |
Correct |
5 ms |
384 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
4 ms |
384 KB |
Output is correct |
3 |
Correct |
5 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
4 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
4 ms |
384 KB |
Output is correct |
8 |
Correct |
5 ms |
384 KB |
Output is correct |
9 |
Correct |
4 ms |
384 KB |
Output is correct |
10 |
Correct |
5 ms |
384 KB |
Output is correct |
11 |
Correct |
4 ms |
384 KB |
Output is correct |
12 |
Correct |
4 ms |
384 KB |
Output is correct |
13 |
Correct |
5 ms |
384 KB |
Output is correct |
14 |
Correct |
4 ms |
384 KB |
Output is correct |
15 |
Correct |
5 ms |
384 KB |
Output is correct |
16 |
Correct |
5 ms |
384 KB |
Output is correct |
17 |
Correct |
5 ms |
384 KB |
Output is correct |
18 |
Correct |
5 ms |
384 KB |
Output is correct |
19 |
Correct |
5 ms |
384 KB |
Output is correct |
20 |
Correct |
5 ms |
384 KB |
Output is correct |
21 |
Correct |
5 ms |
384 KB |
Output is correct |
22 |
Correct |
5 ms |
384 KB |
Output is correct |
23 |
Correct |
5 ms |
384 KB |
Output is correct |
24 |
Correct |
5 ms |
384 KB |
Output is correct |
25 |
Correct |
5 ms |
384 KB |
Output is correct |
26 |
Correct |
5 ms |
384 KB |
Output is correct |
27 |
Correct |
5 ms |
384 KB |
Output is correct |
28 |
Correct |
5 ms |
384 KB |
Output is correct |
29 |
Correct |
5 ms |
384 KB |
Output is correct |
30 |
Correct |
5 ms |
384 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
4 ms |
384 KB |
Output is correct |
3 |
Correct |
5 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
4 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
4 ms |
384 KB |
Output is correct |
8 |
Correct |
5 ms |
384 KB |
Output is correct |
9 |
Correct |
4 ms |
384 KB |
Output is correct |
10 |
Correct |
5 ms |
384 KB |
Output is correct |
11 |
Correct |
4 ms |
384 KB |
Output is correct |
12 |
Correct |
4 ms |
384 KB |
Output is correct |
13 |
Correct |
5 ms |
384 KB |
Output is correct |
14 |
Correct |
4 ms |
384 KB |
Output is correct |
15 |
Correct |
5 ms |
384 KB |
Output is correct |
16 |
Correct |
5 ms |
384 KB |
Output is correct |
17 |
Correct |
5 ms |
384 KB |
Output is correct |
18 |
Correct |
5 ms |
384 KB |
Output is correct |
19 |
Correct |
5 ms |
384 KB |
Output is correct |
20 |
Correct |
5 ms |
384 KB |
Output is correct |
21 |
Correct |
5 ms |
384 KB |
Output is correct |
22 |
Correct |
5 ms |
384 KB |
Output is correct |
23 |
Correct |
5 ms |
384 KB |
Output is correct |
24 |
Correct |
5 ms |
384 KB |
Output is correct |
25 |
Correct |
5 ms |
384 KB |
Output is correct |
26 |
Correct |
5 ms |
384 KB |
Output is correct |
27 |
Correct |
5 ms |
384 KB |
Output is correct |
28 |
Correct |
5 ms |
384 KB |
Output is correct |
29 |
Correct |
5 ms |
384 KB |
Output is correct |
30 |
Correct |
5 ms |
384 KB |
Output is correct |
31 |
Correct |
6 ms |
512 KB |
Output is correct |
32 |
Correct |
6 ms |
512 KB |
Output is correct |
33 |
Correct |
6 ms |
512 KB |
Output is correct |
34 |
Correct |
6 ms |
512 KB |
Output is correct |
35 |
Correct |
7 ms |
512 KB |
Output is correct |
36 |
Correct |
9 ms |
512 KB |
Output is correct |
37 |
Correct |
6 ms |
384 KB |
Output is correct |
38 |
Correct |
6 ms |
384 KB |
Output is correct |
39 |
Correct |
5 ms |
512 KB |
Output is correct |
40 |
Correct |
7 ms |
512 KB |
Output is correct |
41 |
Correct |
5 ms |
384 KB |
Output is correct |
42 |
Correct |
5 ms |
384 KB |
Output is correct |
43 |
Correct |
6 ms |
384 KB |
Output is correct |
44 |
Correct |
6 ms |
512 KB |
Output is correct |
45 |
Correct |
6 ms |
512 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
4 ms |
384 KB |
Output is correct |
3 |
Correct |
5 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
4 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
4 ms |
384 KB |
Output is correct |
8 |
Correct |
5 ms |
384 KB |
Output is correct |
9 |
Correct |
4 ms |
384 KB |
Output is correct |
10 |
Correct |
5 ms |
384 KB |
Output is correct |
11 |
Correct |
4 ms |
384 KB |
Output is correct |
12 |
Correct |
4 ms |
384 KB |
Output is correct |
13 |
Correct |
5 ms |
384 KB |
Output is correct |
14 |
Correct |
4 ms |
384 KB |
Output is correct |
15 |
Correct |
5 ms |
384 KB |
Output is correct |
16 |
Correct |
5 ms |
384 KB |
Output is correct |
17 |
Correct |
5 ms |
384 KB |
Output is correct |
18 |
Correct |
5 ms |
384 KB |
Output is correct |
19 |
Correct |
5 ms |
384 KB |
Output is correct |
20 |
Correct |
5 ms |
384 KB |
Output is correct |
21 |
Correct |
5 ms |
384 KB |
Output is correct |
22 |
Correct |
5 ms |
384 KB |
Output is correct |
23 |
Correct |
5 ms |
384 KB |
Output is correct |
24 |
Correct |
5 ms |
384 KB |
Output is correct |
25 |
Correct |
5 ms |
384 KB |
Output is correct |
26 |
Correct |
5 ms |
384 KB |
Output is correct |
27 |
Correct |
5 ms |
384 KB |
Output is correct |
28 |
Correct |
5 ms |
384 KB |
Output is correct |
29 |
Correct |
5 ms |
384 KB |
Output is correct |
30 |
Correct |
5 ms |
384 KB |
Output is correct |
31 |
Correct |
6 ms |
512 KB |
Output is correct |
32 |
Correct |
6 ms |
512 KB |
Output is correct |
33 |
Correct |
6 ms |
512 KB |
Output is correct |
34 |
Correct |
6 ms |
512 KB |
Output is correct |
35 |
Correct |
7 ms |
512 KB |
Output is correct |
36 |
Correct |
9 ms |
512 KB |
Output is correct |
37 |
Correct |
6 ms |
384 KB |
Output is correct |
38 |
Correct |
6 ms |
384 KB |
Output is correct |
39 |
Correct |
5 ms |
512 KB |
Output is correct |
40 |
Correct |
7 ms |
512 KB |
Output is correct |
41 |
Correct |
5 ms |
384 KB |
Output is correct |
42 |
Correct |
5 ms |
384 KB |
Output is correct |
43 |
Correct |
6 ms |
384 KB |
Output is correct |
44 |
Correct |
6 ms |
512 KB |
Output is correct |
45 |
Correct |
6 ms |
512 KB |
Output is correct |
46 |
Correct |
41 ms |
3832 KB |
Output is correct |
47 |
Correct |
51 ms |
3960 KB |
Output is correct |
48 |
Correct |
64 ms |
4472 KB |
Output is correct |
49 |
Correct |
67 ms |
4472 KB |
Output is correct |
50 |
Correct |
69 ms |
4472 KB |
Output is correct |
51 |
Correct |
70 ms |
4472 KB |
Output is correct |
52 |
Correct |
37 ms |
2424 KB |
Output is correct |
53 |
Correct |
24 ms |
1536 KB |
Output is correct |
54 |
Correct |
33 ms |
3712 KB |
Output is correct |
55 |
Correct |
70 ms |
4472 KB |
Output is correct |
56 |
Correct |
43 ms |
3960 KB |
Output is correct |
57 |
Correct |
42 ms |
3960 KB |
Output is correct |
58 |
Correct |
43 ms |
3960 KB |
Output is correct |
59 |
Correct |
49 ms |
4088 KB |
Output is correct |
60 |
Correct |
49 ms |
4088 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
5 ms |
384 KB |
Output is correct |
2 |
Correct |
4 ms |
384 KB |
Output is correct |
3 |
Correct |
5 ms |
384 KB |
Output is correct |
4 |
Correct |
5 ms |
384 KB |
Output is correct |
5 |
Correct |
4 ms |
384 KB |
Output is correct |
6 |
Correct |
5 ms |
384 KB |
Output is correct |
7 |
Correct |
4 ms |
384 KB |
Output is correct |
8 |
Correct |
5 ms |
384 KB |
Output is correct |
9 |
Correct |
4 ms |
384 KB |
Output is correct |
10 |
Correct |
5 ms |
384 KB |
Output is correct |
11 |
Correct |
4 ms |
384 KB |
Output is correct |
12 |
Correct |
4 ms |
384 KB |
Output is correct |
13 |
Correct |
5 ms |
384 KB |
Output is correct |
14 |
Correct |
4 ms |
384 KB |
Output is correct |
15 |
Correct |
5 ms |
384 KB |
Output is correct |
16 |
Correct |
5 ms |
384 KB |
Output is correct |
17 |
Correct |
5 ms |
384 KB |
Output is correct |
18 |
Correct |
5 ms |
384 KB |
Output is correct |
19 |
Correct |
5 ms |
384 KB |
Output is correct |
20 |
Correct |
5 ms |
384 KB |
Output is correct |
21 |
Correct |
5 ms |
384 KB |
Output is correct |
22 |
Correct |
5 ms |
384 KB |
Output is correct |
23 |
Correct |
5 ms |
384 KB |
Output is correct |
24 |
Correct |
5 ms |
384 KB |
Output is correct |
25 |
Correct |
5 ms |
384 KB |
Output is correct |
26 |
Correct |
5 ms |
384 KB |
Output is correct |
27 |
Correct |
5 ms |
384 KB |
Output is correct |
28 |
Correct |
5 ms |
384 KB |
Output is correct |
29 |
Correct |
5 ms |
384 KB |
Output is correct |
30 |
Correct |
5 ms |
384 KB |
Output is correct |
31 |
Correct |
6 ms |
512 KB |
Output is correct |
32 |
Correct |
6 ms |
512 KB |
Output is correct |
33 |
Correct |
6 ms |
512 KB |
Output is correct |
34 |
Correct |
6 ms |
512 KB |
Output is correct |
35 |
Correct |
7 ms |
512 KB |
Output is correct |
36 |
Correct |
9 ms |
512 KB |
Output is correct |
37 |
Correct |
6 ms |
384 KB |
Output is correct |
38 |
Correct |
6 ms |
384 KB |
Output is correct |
39 |
Correct |
5 ms |
512 KB |
Output is correct |
40 |
Correct |
7 ms |
512 KB |
Output is correct |
41 |
Correct |
5 ms |
384 KB |
Output is correct |
42 |
Correct |
5 ms |
384 KB |
Output is correct |
43 |
Correct |
6 ms |
384 KB |
Output is correct |
44 |
Correct |
6 ms |
512 KB |
Output is correct |
45 |
Correct |
6 ms |
512 KB |
Output is correct |
46 |
Correct |
41 ms |
3832 KB |
Output is correct |
47 |
Correct |
51 ms |
3960 KB |
Output is correct |
48 |
Correct |
64 ms |
4472 KB |
Output is correct |
49 |
Correct |
67 ms |
4472 KB |
Output is correct |
50 |
Correct |
69 ms |
4472 KB |
Output is correct |
51 |
Correct |
70 ms |
4472 KB |
Output is correct |
52 |
Correct |
37 ms |
2424 KB |
Output is correct |
53 |
Correct |
24 ms |
1536 KB |
Output is correct |
54 |
Correct |
33 ms |
3712 KB |
Output is correct |
55 |
Correct |
70 ms |
4472 KB |
Output is correct |
56 |
Correct |
43 ms |
3960 KB |
Output is correct |
57 |
Correct |
42 ms |
3960 KB |
Output is correct |
58 |
Correct |
43 ms |
3960 KB |
Output is correct |
59 |
Correct |
49 ms |
4088 KB |
Output is correct |
60 |
Correct |
49 ms |
4088 KB |
Output is correct |
61 |
Correct |
189 ms |
17912 KB |
Output is correct |
62 |
Correct |
194 ms |
17912 KB |
Output is correct |
63 |
Correct |
222 ms |
18424 KB |
Output is correct |
64 |
Correct |
316 ms |
20604 KB |
Output is correct |
65 |
Correct |
327 ms |
20856 KB |
Output is correct |
66 |
Correct |
332 ms |
20856 KB |
Output is correct |
67 |
Correct |
271 ms |
16760 KB |
Output is correct |
68 |
Correct |
137 ms |
8572 KB |
Output is correct |
69 |
Correct |
142 ms |
16992 KB |
Output is correct |
70 |
Correct |
331 ms |
20884 KB |
Output is correct |
71 |
Correct |
183 ms |
17912 KB |
Output is correct |
72 |
Correct |
207 ms |
18296 KB |
Output is correct |
73 |
Correct |
236 ms |
18936 KB |
Output is correct |
74 |
Correct |
251 ms |
19320 KB |
Output is correct |
75 |
Correct |
250 ms |
19296 KB |
Output is correct |