#include<bits/stdc++.h>
using namespace std;
#define int long long
#define fi first
#define se second
#define pb push_back
#define debug(x) cout<<#x<<": "<<x<<"\n"
signed main()
{
ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
// freopen("input.000","r",stdin);
// freopen("output.000","w",stdout);
// srand((unsigned)time(NULL));
// rand()
int n,i,a[5005],dp[5005][5005],j,cnt,l,diff,optl,ans,dpmax[5005][5005];
cin>>n;
for (i=1;i<n+1;i++) cin>>a[i];
for (j=1;j<n+1;j++) dp[0][j]=dp[1][j]=0;
for (j=1;j<n+1;j++) dpmax[0][j]=dpmax[1][j]=0;
ans=0;
for (i=2;i<n;i++)
{
cnt=0;l=i-1;diff=0;optl=i-1;
dp[i][i+1]=dpmax[i-1][i];
dpmax[i][i+1]=max(dpmax[i-1][i+1],dp[i][i+1]);
for (j=i+2;j<n+1;j++)
{
diff -= a[j-1];
while (diff<0 and l>0)
{
diff += a[l+1];
l--;
}
if (diff==0)
{
cnt++;
optl=l;
}
dp[i][j]=max(dp[i][j-1],dpmax[optl][i]+cnt);
dpmax[i][j]=max(dpmax[i-1][j],dp[i][j]);
ans=max(ans,dp[i][j]);
// cout<<i<<" "<<j<<" "<<dp[i][j]<<" "<<optl<<" "<<cnt<<"\n";
}
}
cout<<ans;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
147 ms |
392624 KB |
Output is correct |
2 |
Correct |
155 ms |
392504 KB |
Output is correct |
3 |
Correct |
247 ms |
392428 KB |
Output is correct |
4 |
Correct |
150 ms |
392424 KB |
Output is correct |
5 |
Correct |
160 ms |
392420 KB |
Output is correct |
6 |
Correct |
168 ms |
392448 KB |
Output is correct |
7 |
Correct |
156 ms |
392400 KB |
Output is correct |
8 |
Correct |
153 ms |
392516 KB |
Output is correct |
9 |
Correct |
150 ms |
392396 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
147 ms |
392624 KB |
Output is correct |
2 |
Correct |
155 ms |
392504 KB |
Output is correct |
3 |
Correct |
247 ms |
392428 KB |
Output is correct |
4 |
Correct |
150 ms |
392424 KB |
Output is correct |
5 |
Correct |
160 ms |
392420 KB |
Output is correct |
6 |
Correct |
168 ms |
392448 KB |
Output is correct |
7 |
Correct |
156 ms |
392400 KB |
Output is correct |
8 |
Correct |
153 ms |
392516 KB |
Output is correct |
9 |
Correct |
150 ms |
392396 KB |
Output is correct |
10 |
Correct |
149 ms |
392592 KB |
Output is correct |
11 |
Correct |
151 ms |
392476 KB |
Output is correct |
12 |
Correct |
151 ms |
392420 KB |
Output is correct |
13 |
Correct |
153 ms |
392468 KB |
Output is correct |
14 |
Correct |
150 ms |
392396 KB |
Output is correct |
15 |
Correct |
157 ms |
392692 KB |
Output is correct |
16 |
Correct |
151 ms |
392396 KB |
Output is correct |
17 |
Correct |
152 ms |
392484 KB |
Output is correct |
18 |
Correct |
149 ms |
392532 KB |
Output is correct |
19 |
Correct |
156 ms |
392532 KB |
Output is correct |
20 |
Correct |
148 ms |
392396 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
147 ms |
392416 KB |
Output is correct |
2 |
Correct |
151 ms |
392504 KB |
Output is correct |
3 |
Correct |
153 ms |
392524 KB |
Output is correct |
4 |
Correct |
153 ms |
392508 KB |
Output is correct |
5 |
Correct |
149 ms |
392396 KB |
Output is correct |
6 |
Correct |
150 ms |
392404 KB |
Output is correct |
7 |
Correct |
152 ms |
392408 KB |
Output is correct |
8 |
Correct |
150 ms |
392436 KB |
Output is correct |
9 |
Correct |
152 ms |
392392 KB |
Output is correct |
10 |
Correct |
151 ms |
392544 KB |
Output is correct |
11 |
Correct |
152 ms |
392472 KB |
Output is correct |
12 |
Correct |
150 ms |
392448 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
147 ms |
392624 KB |
Output is correct |
2 |
Correct |
155 ms |
392504 KB |
Output is correct |
3 |
Correct |
247 ms |
392428 KB |
Output is correct |
4 |
Correct |
150 ms |
392424 KB |
Output is correct |
5 |
Correct |
160 ms |
392420 KB |
Output is correct |
6 |
Correct |
168 ms |
392448 KB |
Output is correct |
7 |
Correct |
156 ms |
392400 KB |
Output is correct |
8 |
Correct |
153 ms |
392516 KB |
Output is correct |
9 |
Correct |
150 ms |
392396 KB |
Output is correct |
10 |
Correct |
149 ms |
392592 KB |
Output is correct |
11 |
Correct |
151 ms |
392476 KB |
Output is correct |
12 |
Correct |
151 ms |
392420 KB |
Output is correct |
13 |
Correct |
153 ms |
392468 KB |
Output is correct |
14 |
Correct |
150 ms |
392396 KB |
Output is correct |
15 |
Correct |
157 ms |
392692 KB |
Output is correct |
16 |
Correct |
151 ms |
392396 KB |
Output is correct |
17 |
Correct |
152 ms |
392484 KB |
Output is correct |
18 |
Correct |
149 ms |
392532 KB |
Output is correct |
19 |
Correct |
156 ms |
392532 KB |
Output is correct |
20 |
Correct |
148 ms |
392396 KB |
Output is correct |
21 |
Correct |
147 ms |
392416 KB |
Output is correct |
22 |
Correct |
151 ms |
392504 KB |
Output is correct |
23 |
Correct |
153 ms |
392524 KB |
Output is correct |
24 |
Correct |
153 ms |
392508 KB |
Output is correct |
25 |
Correct |
149 ms |
392396 KB |
Output is correct |
26 |
Correct |
150 ms |
392404 KB |
Output is correct |
27 |
Correct |
152 ms |
392408 KB |
Output is correct |
28 |
Correct |
150 ms |
392436 KB |
Output is correct |
29 |
Correct |
152 ms |
392392 KB |
Output is correct |
30 |
Correct |
151 ms |
392544 KB |
Output is correct |
31 |
Correct |
152 ms |
392472 KB |
Output is correct |
32 |
Correct |
150 ms |
392448 KB |
Output is correct |
33 |
Correct |
151 ms |
392480 KB |
Output is correct |
34 |
Correct |
148 ms |
392440 KB |
Output is correct |
35 |
Correct |
148 ms |
392532 KB |
Output is correct |
36 |
Correct |
147 ms |
392396 KB |
Output is correct |
37 |
Correct |
156 ms |
392472 KB |
Output is correct |
38 |
Correct |
159 ms |
392432 KB |
Output is correct |
39 |
Correct |
151 ms |
392652 KB |
Output is correct |
40 |
Correct |
156 ms |
392396 KB |
Output is correct |
41 |
Correct |
147 ms |
392568 KB |
Output is correct |
42 |
Correct |
149 ms |
392444 KB |
Output is correct |
43 |
Correct |
150 ms |
392564 KB |
Output is correct |
44 |
Correct |
149 ms |
392416 KB |
Output is correct |
45 |
Correct |
150 ms |
392396 KB |
Output is correct |
46 |
Correct |
151 ms |
392488 KB |
Output is correct |
47 |
Correct |
153 ms |
392396 KB |
Output is correct |
48 |
Correct |
148 ms |
392488 KB |
Output is correct |
49 |
Correct |
147 ms |
392392 KB |
Output is correct |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
147 ms |
392624 KB |
Output is correct |
2 |
Correct |
155 ms |
392504 KB |
Output is correct |
3 |
Correct |
247 ms |
392428 KB |
Output is correct |
4 |
Correct |
150 ms |
392424 KB |
Output is correct |
5 |
Correct |
160 ms |
392420 KB |
Output is correct |
6 |
Correct |
168 ms |
392448 KB |
Output is correct |
7 |
Correct |
156 ms |
392400 KB |
Output is correct |
8 |
Correct |
153 ms |
392516 KB |
Output is correct |
9 |
Correct |
150 ms |
392396 KB |
Output is correct |
10 |
Correct |
149 ms |
392592 KB |
Output is correct |
11 |
Correct |
151 ms |
392476 KB |
Output is correct |
12 |
Correct |
151 ms |
392420 KB |
Output is correct |
13 |
Correct |
153 ms |
392468 KB |
Output is correct |
14 |
Correct |
150 ms |
392396 KB |
Output is correct |
15 |
Correct |
157 ms |
392692 KB |
Output is correct |
16 |
Correct |
151 ms |
392396 KB |
Output is correct |
17 |
Correct |
152 ms |
392484 KB |
Output is correct |
18 |
Correct |
149 ms |
392532 KB |
Output is correct |
19 |
Correct |
156 ms |
392532 KB |
Output is correct |
20 |
Correct |
148 ms |
392396 KB |
Output is correct |
21 |
Correct |
147 ms |
392416 KB |
Output is correct |
22 |
Correct |
151 ms |
392504 KB |
Output is correct |
23 |
Correct |
153 ms |
392524 KB |
Output is correct |
24 |
Correct |
153 ms |
392508 KB |
Output is correct |
25 |
Correct |
149 ms |
392396 KB |
Output is correct |
26 |
Correct |
150 ms |
392404 KB |
Output is correct |
27 |
Correct |
152 ms |
392408 KB |
Output is correct |
28 |
Correct |
150 ms |
392436 KB |
Output is correct |
29 |
Correct |
152 ms |
392392 KB |
Output is correct |
30 |
Correct |
151 ms |
392544 KB |
Output is correct |
31 |
Correct |
152 ms |
392472 KB |
Output is correct |
32 |
Correct |
150 ms |
392448 KB |
Output is correct |
33 |
Correct |
151 ms |
392480 KB |
Output is correct |
34 |
Correct |
148 ms |
392440 KB |
Output is correct |
35 |
Correct |
148 ms |
392532 KB |
Output is correct |
36 |
Correct |
147 ms |
392396 KB |
Output is correct |
37 |
Correct |
156 ms |
392472 KB |
Output is correct |
38 |
Correct |
159 ms |
392432 KB |
Output is correct |
39 |
Correct |
151 ms |
392652 KB |
Output is correct |
40 |
Correct |
156 ms |
392396 KB |
Output is correct |
41 |
Correct |
147 ms |
392568 KB |
Output is correct |
42 |
Correct |
149 ms |
392444 KB |
Output is correct |
43 |
Correct |
150 ms |
392564 KB |
Output is correct |
44 |
Correct |
149 ms |
392416 KB |
Output is correct |
45 |
Correct |
150 ms |
392396 KB |
Output is correct |
46 |
Correct |
151 ms |
392488 KB |
Output is correct |
47 |
Correct |
153 ms |
392396 KB |
Output is correct |
48 |
Correct |
148 ms |
392488 KB |
Output is correct |
49 |
Correct |
147 ms |
392392 KB |
Output is correct |
50 |
Correct |
218 ms |
392396 KB |
Output is correct |
51 |
Correct |
217 ms |
392432 KB |
Output is correct |
52 |
Correct |
216 ms |
392512 KB |
Output is correct |
53 |
Correct |
223 ms |
392520 KB |
Output is correct |
54 |
Correct |
221 ms |
392480 KB |
Output is correct |
55 |
Correct |
251 ms |
392520 KB |
Output is correct |
56 |
Correct |
237 ms |
392520 KB |
Output is correct |
57 |
Correct |
235 ms |
392708 KB |
Output is correct |
58 |
Correct |
235 ms |
392396 KB |
Output is correct |
59 |
Correct |
235 ms |
392520 KB |
Output is correct |
60 |
Correct |
220 ms |
392620 KB |
Output is correct |
61 |
Correct |
203 ms |
392524 KB |
Output is correct |
62 |
Correct |
198 ms |
392600 KB |
Output is correct |
63 |
Correct |
195 ms |
392500 KB |
Output is correct |
64 |
Correct |
197 ms |
392488 KB |
Output is correct |
65 |
Correct |
196 ms |
392524 KB |
Output is correct |
66 |
Correct |
200 ms |
392660 KB |
Output is correct |
67 |
Correct |
188 ms |
392524 KB |
Output is correct |
68 |
Correct |
190 ms |
392520 KB |
Output is correct |
69 |
Correct |
193 ms |
392456 KB |
Output is correct |
70 |
Correct |
211 ms |
392528 KB |
Output is correct |
71 |
Correct |
230 ms |
392624 KB |
Output is correct |
72 |
Correct |
216 ms |
392552 KB |
Output is correct |