#include "bits/stdc++.h"
using namespace std;
const int inf = (int) 1e9, N = (int) 70000 + 22, A = 10;
int n, need[N], add = 0, ans = inf, all = 0;
string s, t = "";
vector<int> pos;
void upd(int& x, int y) {
x = min(x, y);
}
void solve() {
cin >> n >> s;
add = std::count(s.begin(), s.end(), 'e');
if (!add) {
cout << 0 << '\n';
return;
}
for (int i = 0; i < n; i++) {
if (s[i] != 'e') {
if (i && s[i - 1] == 'e') {
need[(int) t.size()] = 1;
pos.push_back((int) t.size());
}
t += s[i];
}
}
t.push_back('e');
s = t, n = (int) s.size(), all = (int) pos.size();
vector dp(n, vector<int> (10, inf));
vector dp2(n, vector (10, vector<int> (10, inf)));
for (int j = 0; j < 10; j++) {
dp[0][j] = 0;
}
for (int i = 1; i < n; i++) {
for (int j = 0; j < 10; j++) {
if (j != s[i - 1] - 'a' && need[i - 1]) {}
else {
upd(dp[i][j], dp[i - 1][j] + 2 * int(s[i] - 'a' == j));
}
upd(dp[i][j], dp[i - 1][s[i - 1] - 'a'] + 2 * int(s[i] - 'a' == j));
upd(dp[i][j], dp2[i - 1][s[i - 1] - 'a'][j] + 2 * int(s[i] - 'a' == j));
upd(dp[i][j], dp2[i - 1][s[i - 1] - 'a'][s[i - 1] - 'a'] + 2 * int(s[i] - 'a' == j));
for (int k = 0; k < 10; k++) {
upd(dp2[i][j][k], dp[i - 1][j] + 2 * int(s[i] - 'a' == j) + 1 + 2 * int(s[i] - 'a' == k));
upd(dp2[i][j][k], dp[i - 1][s[i - 1] - 'a'] + 2 * int(s[i] - 'a' == j) + 1 + 2 * int(s[i] - 'a' == k));
upd(dp2[i][j][k], dp2[i - 1][j][k] + 2 * int(s[i] - 'a' == j) + 1 + 2 * int(s[i] - 'a' == k));
upd(dp2[i][j][k], dp2[i - 1][s[i - 1] - 'a'][k] + 2 * int(s[i] - 'a' == j) + 1 + 2 * int(s[i] - 'a' == k));
upd(dp2[i][j][k], dp2[i - 1][j][s[i - 1] - 'a'] + 2 * int(s[i] - 'a' == j) + 1 + 2 * int(s[i] - 'a' == k));
upd(dp2[i][j][k], dp2[i - 1][s[i - 1] - 'a'][s[i - 1] - 'a'] + 2 * int(s[i] - 'a' == j) + 1 + 2 * int(s[i] - 'a' == k));
}
}
}
cout << dp[n - 1][4] - 2 + 2 * add << '\n';
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int t = 1;
// cin >> t;
while (t--) {
solve();
}
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
592 KB |
Output is correct |
| 2 |
Correct |
2 ms |
592 KB |
Output is correct |
| 3 |
Correct |
1 ms |
472 KB |
Output is correct |
| 4 |
Correct |
1 ms |
592 KB |
Output is correct |
| 5 |
Correct |
2 ms |
592 KB |
Output is correct |
| 6 |
Correct |
1 ms |
604 KB |
Output is correct |
| 7 |
Correct |
1 ms |
592 KB |
Output is correct |
| 8 |
Correct |
1 ms |
472 KB |
Output is correct |
| 9 |
Correct |
1 ms |
336 KB |
Output is correct |
| 10 |
Correct |
1 ms |
336 KB |
Output is correct |
| 11 |
Correct |
1 ms |
336 KB |
Output is correct |
| 12 |
Correct |
1 ms |
336 KB |
Output is correct |
| 13 |
Correct |
1 ms |
592 KB |
Output is correct |
| 14 |
Correct |
1 ms |
592 KB |
Output is correct |
| 15 |
Correct |
2 ms |
592 KB |
Output is correct |
| 16 |
Correct |
2 ms |
476 KB |
Output is correct |
| 17 |
Correct |
2 ms |
592 KB |
Output is correct |
| 18 |
Correct |
1 ms |
756 KB |
Output is correct |
| 19 |
Correct |
1 ms |
592 KB |
Output is correct |
| 20 |
Correct |
1 ms |
592 KB |
Output is correct |
| 21 |
Correct |
1 ms |
592 KB |
Output is correct |
| 22 |
Correct |
1 ms |
468 KB |
Output is correct |
| 23 |
Correct |
1 ms |
592 KB |
Output is correct |
| 24 |
Correct |
2 ms |
592 KB |
Output is correct |
| 25 |
Correct |
2 ms |
592 KB |
Output is correct |
| 26 |
Correct |
1 ms |
592 KB |
Output is correct |
| 27 |
Correct |
2 ms |
608 KB |
Output is correct |
| 28 |
Correct |
1 ms |
592 KB |
Output is correct |
| 29 |
Correct |
1 ms |
592 KB |
Output is correct |
| 30 |
Correct |
2 ms |
592 KB |
Output is correct |
| 31 |
Correct |
2 ms |
760 KB |
Output is correct |
| 32 |
Correct |
2 ms |
592 KB |
Output is correct |
| 33 |
Correct |
2 ms |
592 KB |
Output is correct |
| 34 |
Correct |
2 ms |
592 KB |
Output is correct |
| 35 |
Correct |
2 ms |
592 KB |
Output is correct |
| 36 |
Correct |
2 ms |
592 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
4 ms |
1872 KB |
Output is correct |
| 2 |
Correct |
6 ms |
2524 KB |
Output is correct |
| 3 |
Correct |
4 ms |
1360 KB |
Output is correct |
| 4 |
Correct |
4 ms |
2008 KB |
Output is correct |
| 5 |
Correct |
6 ms |
2652 KB |
Output is correct |
| 6 |
Correct |
7 ms |
3408 KB |
Output is correct |
| 7 |
Correct |
5 ms |
2384 KB |
Output is correct |
| 8 |
Correct |
5 ms |
2556 KB |
Output is correct |
| 9 |
Correct |
6 ms |
2808 KB |
Output is correct |
| 10 |
Correct |
6 ms |
2808 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
86 ms |
37052 KB |
Output is correct |
| 2 |
Correct |
76 ms |
35628 KB |
Output is correct |
| 3 |
Correct |
86 ms |
37608 KB |
Output is correct |
| 4 |
Correct |
115 ms |
38216 KB |
Output is correct |
| 5 |
Correct |
103 ms |
42576 KB |
Output is correct |
| 6 |
Correct |
50 ms |
19392 KB |
Output is correct |
| 7 |
Correct |
71 ms |
31980 KB |
Output is correct |
| 8 |
Correct |
88 ms |
36936 KB |
Output is correct |
| 9 |
Correct |
60 ms |
27464 KB |
Output is correct |
| 10 |
Correct |
60 ms |
26264 KB |
Output is correct |
| 11 |
Correct |
89 ms |
38120 KB |
Output is correct |
| 12 |
Correct |
98 ms |
42588 KB |
Output is correct |
| 13 |
Correct |
101 ms |
41808 KB |
Output is correct |
| 14 |
Correct |
103 ms |
41108 KB |
Output is correct |
| 15 |
Correct |
95 ms |
34636 KB |
Output is correct |
| 16 |
Correct |
91 ms |
37452 KB |
Output is correct |
| 17 |
Correct |
106 ms |
36936 KB |
Output is correct |
| 18 |
Correct |
86 ms |
37424 KB |
Output is correct |
| 19 |
Correct |
104 ms |
35656 KB |
Output is correct |
| 20 |
Correct |
69 ms |
30132 KB |
Output is correct |
