// And you curse yourself for things you never done
#include<bits/stdc++.h>
#define F first
#define S second
#define PB push_back
#define sz(s) int((s).size())
#define bit(n,k) (((n)>>(k))&1)
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
const int maxn = 5010, mod = 1e9 + 7, inf = 1e9 + 10;
int nxt[maxn][10], lst[10];
map<pii, int> dp;
vector<int> poses;
int solve(int i, int j){
if(i >= sz(poses))
return 0;
if(dp.count({i, j}))
return dp[{i, j}];
int ans = inf;
if(j >= poses[i])
ans = j - poses[i] + solve( upper_bound(poses.begin(), poses.end(), j) - poses.begin(), poses[i] );
int pt = lower_bound(nxt[j], nxt[j] + 10, poses[i]) - nxt[j];
for(int w = 8 ; w >= 0 && nxt[j][w] != j && w >= pt-1; w--)
ans = min(ans, 2 + solve(i, nxt[j][w]));
return dp[{i, j}] = ans;
}
int main(){
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie();
int n;
cin >> n;
string _s, s;
cin >> _s;
int ans = 0;
for(int i = 0; i < n; i++){
if(_s[i] == 'e')
ans+= 2;
if(_s[i] == 'e' && _s[i + 1] != 'e')
poses.PB(sz(s));
if(_s[i] != 'e')
s+= _s[i];
}
memset(lst, -1, sizeof lst);
memset(nxt, -1, sizeof nxt);
n = sz(s);
for(int i = n-1; i >= 0; i--){
for(int j = 0; j < 9; j++)
nxt[i][j] = (lst[j] == -1 ? i : lst[j]);
sort(nxt[i], nxt[i] + 9);
nxt[i][9] = inf;
int id = (s[i] - 'a') - (s[i] > 'e');
lst[id] = i;
}
ans+= solve(0, 0);
return cout << ans << "\n", 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
49 ms |
2424 KB |
Output is correct |
| 2 |
Correct |
32 ms |
2972 KB |
Output is correct |
| 3 |
Correct |
16 ms |
1792 KB |
Output is correct |
| 4 |
Correct |
39 ms |
2680 KB |
Output is correct |
| 5 |
Correct |
47 ms |
2936 KB |
Output is correct |
| 6 |
Correct |
74 ms |
4216 KB |
Output is correct |
| 7 |
Correct |
61 ms |
3832 KB |
Output is correct |
| 8 |
Correct |
1 ms |
512 KB |
Output is correct |
| 9 |
Correct |
1 ms |
512 KB |
Output is correct |
| 10 |
Correct |
1 ms |
512 KB |
Output is correct |
| 11 |
Correct |
1 ms |
512 KB |
Output is correct |
| 12 |
Correct |
1 ms |
512 KB |
Output is correct |
| 13 |
Correct |
37 ms |
2424 KB |
Output is correct |
| 14 |
Correct |
32 ms |
2936 KB |
Output is correct |
| 15 |
Correct |
18 ms |
1792 KB |
Output is correct |
| 16 |
Correct |
38 ms |
2936 KB |
Output is correct |
| 17 |
Correct |
46 ms |
2936 KB |
Output is correct |
| 18 |
Correct |
36 ms |
2572 KB |
Output is correct |
| 19 |
Correct |
29 ms |
2424 KB |
Output is correct |
| 20 |
Correct |
33 ms |
2580 KB |
Output is correct |
| 21 |
Correct |
42 ms |
2672 KB |
Output is correct |
| 22 |
Correct |
48 ms |
2928 KB |
Output is correct |
| 23 |
Correct |
24 ms |
1964 KB |
Output is correct |
| 24 |
Correct |
38 ms |
2236 KB |
Output is correct |
| 25 |
Correct |
28 ms |
2040 KB |
Output is correct |
| 26 |
Correct |
33 ms |
2424 KB |
Output is correct |
| 27 |
Correct |
55 ms |
3412 KB |
Output is correct |
| 28 |
Correct |
73 ms |
4216 KB |
Output is correct |
| 29 |
Correct |
57 ms |
3784 KB |
Output is correct |
| 30 |
Correct |
34 ms |
2680 KB |
Output is correct |
| 31 |
Correct |
35 ms |
2296 KB |
Output is correct |
| 32 |
Correct |
47 ms |
2492 KB |
Output is correct |
| 33 |
Correct |
34 ms |
2552 KB |
Output is correct |
| 34 |
Correct |
48 ms |
3064 KB |
Output is correct |
| 35 |
Correct |
52 ms |
3448 KB |
Output is correct |
| 36 |
Correct |
57 ms |
3832 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Execution timed out |
2089 ms |
78328 KB |
Time limit exceeded |
| 2 |
Execution timed out |
2101 ms |
72200 KB |
Time limit exceeded |
| 3 |
Correct |
1617 ms |
62396 KB |
Output is correct |
| 4 |
Execution timed out |
2095 ms |
81644 KB |
Time limit exceeded |
| 5 |
Execution timed out |
2097 ms |
66208 KB |
Time limit exceeded |
| 6 |
Execution timed out |
2098 ms |
69752 KB |
Time limit exceeded |
| 7 |
Execution timed out |
2097 ms |
81884 KB |
Time limit exceeded |
| 8 |
Execution timed out |
2100 ms |
78968 KB |
Time limit exceeded |
| 9 |
Execution timed out |
2099 ms |
65948 KB |
Time limit exceeded |
| 10 |
Execution timed out |
2085 ms |
79664 KB |
Time limit exceeded |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
2 ms |
1408 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 2 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 3 |
Runtime error |
2 ms |
1408 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 4 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 5 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 6 |
Runtime error |
2 ms |
1408 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 7 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 8 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 9 |
Runtime error |
3 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 10 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 11 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 12 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 13 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 14 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 15 |
Runtime error |
2 ms |
1664 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 16 |
Runtime error |
2 ms |
1408 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 17 |
Runtime error |
2 ms |
1408 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 18 |
Runtime error |
2 ms |
1408 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 19 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 20 |
Runtime error |
2 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
