#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define F first
#define S second
#define pb push_back
#define endl "\n"
#define all(x) x.begin(), x.end()
const int M = 5007;
const ll inf = 1e18;
const ll mod = 1e9 + 7;
const double pi = acos(-1);
const double eps = 1e-6;
const int dx[] = {0, -1, 0, 1}, dy[] = {1, 0, -1, 0};
const int block = 320;
int n, a[M], dp[M][M], ans;
int main(){
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
cin >> n;
for(int i = 1; i <= n; ++i) cin >> a[i];
for(int i = 1; i <= n; ++i){
for(int j = 1; j <= i; ++j){
if(i > 1) dp[j][i - 1] = max(dp[j][i - 1], dp[j][i - 2]);
dp[j][i - 1] = max(dp[j][i - 1], dp[j - 1][i - 1]);
}
int lenk = 0, lenj = 0, k = i - 1, cnt = 0;
for(int j = i; j <= n; ++j){
lenj += a[j];
while(k > 1 && lenk < lenj) lenk += a[k--];
if(lenj == lenk) ++cnt;
dp[i][j + 1] = max(dp[i][j + 1], dp[k][i - 1] + cnt);
}
}
for(int i = 1; i <= n; ++i) ans = max(ans, dp[i][n]);
cout << ans << endl;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Correct |
1 ms |
340 KB |
Output is correct |
3 |
Correct |
0 ms |
340 KB |
Output is correct |
4 |
Correct |
1 ms |
340 KB |
Output is correct |
5 |
Correct |
0 ms |
340 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
0 ms |
340 KB |
Output is correct |
8 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
9 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Correct |
1 ms |
340 KB |
Output is correct |
3 |
Correct |
0 ms |
340 KB |
Output is correct |
4 |
Correct |
1 ms |
340 KB |
Output is correct |
5 |
Correct |
0 ms |
340 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
0 ms |
340 KB |
Output is correct |
8 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
9 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
2772 KB |
Output is correct |
2 |
Correct |
3 ms |
2772 KB |
Output is correct |
3 |
Correct |
3 ms |
2772 KB |
Output is correct |
4 |
Correct |
3 ms |
2772 KB |
Output is correct |
5 |
Correct |
2 ms |
2772 KB |
Output is correct |
6 |
Correct |
3 ms |
2772 KB |
Output is correct |
7 |
Correct |
3 ms |
2772 KB |
Output is correct |
8 |
Correct |
3 ms |
2772 KB |
Output is correct |
9 |
Correct |
3 ms |
2772 KB |
Output is correct |
10 |
Correct |
3 ms |
2772 KB |
Output is correct |
11 |
Correct |
3 ms |
2772 KB |
Output is correct |
12 |
Correct |
3 ms |
2772 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Correct |
1 ms |
340 KB |
Output is correct |
3 |
Correct |
0 ms |
340 KB |
Output is correct |
4 |
Correct |
1 ms |
340 KB |
Output is correct |
5 |
Correct |
0 ms |
340 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
0 ms |
340 KB |
Output is correct |
8 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
9 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Correct |
1 ms |
340 KB |
Output is correct |
3 |
Correct |
0 ms |
340 KB |
Output is correct |
4 |
Correct |
1 ms |
340 KB |
Output is correct |
5 |
Correct |
0 ms |
340 KB |
Output is correct |
6 |
Correct |
0 ms |
340 KB |
Output is correct |
7 |
Correct |
0 ms |
340 KB |
Output is correct |
8 |
Incorrect |
1 ms |
340 KB |
Output isn't correct |
9 |
Halted |
0 ms |
0 KB |
- |