#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int inf = 1e9;
signed main() {
cin.tie(0)->sync_with_stdio(0);
int n;
string t;
cin >> n >> t;
vector<int> e;
string s;
for (char c : t) {
if (c != 'e') {
s += c;
e.push_back(0);
} else {
e.back()++;
}
}
n = s.size();
auto sum =[&](int l, int r) {
ll s = 0;
for (;l <= r; l++)
s += e[l];
return s;
};
vector memo(n, vector(n, -1));
auto dp = [&](auto& dp, int i, int ne)->int {
if (ne == n) return 0;
int& res = memo[i][ne];
if (res!=-1) return res;
res = inf;
set<char> seen;
for (int j = i+1; j < n; j++) {
if (seen.count(s[j])) continue;
seen.insert(s[j]);
int nne = j;
while (nne < n && e[nne] == 0) nne++;
int dist = j - ne;
int ec = sum(ne, j-1);
res = min(res, dp(dp, ne, nne) + max(0, dist) + max(0, ec * 2 - 1) + 2);
}
//cout << i << ' ' << ne << ' ' << res << '\n';
return res;
};
int ne = 0;
while (ne < n && e[ne] == 0) ne++;
cout << dp(dp, 0, ne) << '\n';
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
43 ms |
596 KB |
Output is correct |
| 2 |
Incorrect |
44 ms |
692 KB |
Output isn't correct |
| 3 |
Incorrect |
16 ms |
600 KB |
Output isn't correct |
| 4 |
Incorrect |
68 ms |
596 KB |
Output isn't correct |
| 5 |
Correct |
78 ms |
612 KB |
Output is correct |
| 6 |
Incorrect |
141 ms |
692 KB |
Output isn't correct |
| 7 |
Incorrect |
105 ms |
724 KB |
Output isn't correct |
| 8 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 9 |
Correct |
1 ms |
272 KB |
Output is correct |
| 10 |
Incorrect |
1 ms |
212 KB |
Output isn't correct |
| 11 |
Correct |
1 ms |
212 KB |
Output is correct |
| 12 |
Correct |
1 ms |
212 KB |
Output is correct |
| 13 |
Correct |
42 ms |
580 KB |
Output is correct |
| 14 |
Incorrect |
58 ms |
596 KB |
Output isn't correct |
| 15 |
Incorrect |
14 ms |
596 KB |
Output isn't correct |
| 16 |
Incorrect |
47 ms |
668 KB |
Output isn't correct |
| 17 |
Incorrect |
73 ms |
824 KB |
Output isn't correct |
| 18 |
Incorrect |
53 ms |
604 KB |
Output isn't correct |
| 19 |
Incorrect |
43 ms |
468 KB |
Output isn't correct |
| 20 |
Correct |
53 ms |
556 KB |
Output is correct |
| 21 |
Incorrect |
70 ms |
620 KB |
Output isn't correct |
| 22 |
Correct |
75 ms |
608 KB |
Output is correct |
| 23 |
Incorrect |
19 ms |
960 KB |
Output isn't correct |
| 24 |
Incorrect |
38 ms |
724 KB |
Output isn't correct |
| 25 |
Incorrect |
38 ms |
788 KB |
Output isn't correct |
| 26 |
Incorrect |
48 ms |
808 KB |
Output isn't correct |
| 27 |
Incorrect |
104 ms |
724 KB |
Output isn't correct |
| 28 |
Incorrect |
150 ms |
692 KB |
Output isn't correct |
| 29 |
Incorrect |
149 ms |
736 KB |
Output isn't correct |
| 30 |
Incorrect |
37 ms |
852 KB |
Output isn't correct |
| 31 |
Incorrect |
44 ms |
784 KB |
Output isn't correct |
| 32 |
Incorrect |
46 ms |
880 KB |
Output isn't correct |
| 33 |
Incorrect |
50 ms |
972 KB |
Output isn't correct |
| 34 |
Incorrect |
80 ms |
672 KB |
Output isn't correct |
| 35 |
Incorrect |
102 ms |
620 KB |
Output isn't correct |
| 36 |
Incorrect |
101 ms |
724 KB |
Output isn't correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Execution timed out |
2084 ms |
14420 KB |
Time limit exceeded |
| 2 |
Execution timed out |
2033 ms |
28756 KB |
Time limit exceeded |
| 3 |
Execution timed out |
2081 ms |
7636 KB |
Time limit exceeded |
| 4 |
Execution timed out |
2072 ms |
14420 KB |
Time limit exceeded |
| 5 |
Execution timed out |
2050 ms |
31132 KB |
Time limit exceeded |
| 6 |
Execution timed out |
2064 ms |
52412 KB |
Time limit exceeded |
| 7 |
Execution timed out |
2075 ms |
22100 KB |
Time limit exceeded |
| 8 |
Execution timed out |
2085 ms |
22484 KB |
Time limit exceeded |
| 9 |
Execution timed out |
2081 ms |
28756 KB |
Time limit exceeded |
| 10 |
Execution timed out |
2080 ms |
31828 KB |
Time limit exceeded |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
198 ms |
524288 KB |
Execution killed with signal 9 |
| 2 |
Runtime error |
208 ms |
524288 KB |
Execution killed with signal 9 |
| 3 |
Runtime error |
197 ms |
524288 KB |
Execution killed with signal 9 |
| 4 |
Runtime error |
192 ms |
524288 KB |
Execution killed with signal 9 |
| 5 |
Runtime error |
204 ms |
524288 KB |
Execution killed with signal 9 |
| 6 |
Runtime error |
191 ms |
524288 KB |
Execution killed with signal 9 |
| 7 |
Runtime error |
200 ms |
524288 KB |
Execution killed with signal 9 |
| 8 |
Runtime error |
185 ms |
524288 KB |
Execution killed with signal 9 |
| 9 |
Runtime error |
198 ms |
524288 KB |
Execution killed with signal 9 |
| 10 |
Runtime error |
198 ms |
524288 KB |
Execution killed with signal 9 |
| 11 |
Runtime error |
200 ms |
524288 KB |
Execution killed with signal 9 |
| 12 |
Runtime error |
202 ms |
524288 KB |
Execution killed with signal 9 |
| 13 |
Runtime error |
191 ms |
524288 KB |
Execution killed with signal 9 |
| 14 |
Runtime error |
187 ms |
524288 KB |
Execution killed with signal 9 |
| 15 |
Runtime error |
210 ms |
524288 KB |
Execution killed with signal 9 |
| 16 |
Runtime error |
201 ms |
524288 KB |
Execution killed with signal 9 |
| 17 |
Runtime error |
195 ms |
524288 KB |
Execution killed with signal 9 |
| 18 |
Runtime error |
209 ms |
524288 KB |
Execution killed with signal 9 |
| 19 |
Runtime error |
199 ms |
524288 KB |
Execution killed with signal 9 |
| 20 |
Runtime error |
201 ms |
524288 KB |
Execution killed with signal 9 |
