// 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 DP[maxn][maxn];
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}];
if(j >= poses[i])
return dp[{i, j}] = 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];
/*
if(pt == 9)
return dp[{i, j}] = 2 + solve(i, nxt[j][8]);
int ans = 2 + solve(i, nxt[j][pt]);
if(pt != 0 && nxt[j][pt-1] != j)
ans = min(ans, 2 + solve(i, nxt[j][pt-1]) );
return dp[{i, j}] = ans;*/
int ans = inf;
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;
}
/*
for(int i = sz(poses)-1; i >= 0; i--){
int pt = sz(poses)-1;
for(int j = n-1; j >= 0; j--){
DP[i][j] = inf;
if(pt >= i)
DP[i][j] = j - poses[i] + DP[pt + 1][poses[i]];
for(int k = 0; k < 9; k++)
if(nxt[j][k] != -1)
DP[i][j] = min(DP[i][j], 2 + DP[i][nxt[j][k]]);
if(poses[pt] == j)
pt--;
if(DP[i][j] != solve(i, j))
cout << "HHH " << " " << s[j-1] << s[j] << s[j+1] << " " << i << " " << j << " " << solve(i, j) << " " << DP[i][j] << endl;
}
}
*/
ans+= solve(0, 0);
return cout << ans << "\n", 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
640 KB |
Output is correct |
| 2 |
Incorrect |
1 ms |
640 KB |
Output isn't correct |
| 3 |
Incorrect |
1 ms |
640 KB |
Output isn't correct |
| 4 |
Correct |
2 ms |
640 KB |
Output is correct |
| 5 |
Correct |
2 ms |
640 KB |
Output is correct |
| 6 |
Correct |
3 ms |
768 KB |
Output is correct |
| 7 |
Correct |
2 ms |
768 KB |
Output is correct |
| 8 |
Correct |
1 ms |
512 KB |
Output is correct |
| 9 |
Correct |
0 ms |
512 KB |
Output is correct |
| 10 |
Correct |
0 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 |
2 ms |
640 KB |
Output is correct |
| 14 |
Incorrect |
1 ms |
640 KB |
Output isn't correct |
| 15 |
Incorrect |
1 ms |
640 KB |
Output isn't correct |
| 16 |
Incorrect |
2 ms |
640 KB |
Output isn't correct |
| 17 |
Correct |
2 ms |
640 KB |
Output is correct |
| 18 |
Correct |
2 ms |
640 KB |
Output is correct |
| 19 |
Incorrect |
1 ms |
640 KB |
Output isn't correct |
| 20 |
Correct |
2 ms |
640 KB |
Output is correct |
| 21 |
Correct |
2 ms |
640 KB |
Output is correct |
| 22 |
Correct |
2 ms |
768 KB |
Output is correct |
| 23 |
Correct |
1 ms |
640 KB |
Output is correct |
| 24 |
Correct |
1 ms |
640 KB |
Output is correct |
| 25 |
Correct |
1 ms |
640 KB |
Output is correct |
| 26 |
Correct |
1 ms |
640 KB |
Output is correct |
| 27 |
Correct |
2 ms |
768 KB |
Output is correct |
| 28 |
Correct |
3 ms |
768 KB |
Output is correct |
| 29 |
Incorrect |
2 ms |
768 KB |
Output isn't correct |
| 30 |
Incorrect |
1 ms |
640 KB |
Output isn't correct |
| 31 |
Correct |
1 ms |
640 KB |
Output is correct |
| 32 |
Incorrect |
1 ms |
640 KB |
Output isn't correct |
| 33 |
Correct |
1 ms |
640 KB |
Output is correct |
| 34 |
Correct |
2 ms |
768 KB |
Output is correct |
| 35 |
Correct |
3 ms |
768 KB |
Output is correct |
| 36 |
Correct |
2 ms |
768 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
23 ms |
2176 KB |
Output is correct |
| 2 |
Correct |
31 ms |
3196 KB |
Output is correct |
| 3 |
Correct |
10 ms |
1536 KB |
Output is correct |
| 4 |
Correct |
19 ms |
2168 KB |
Output is correct |
| 5 |
Incorrect |
31 ms |
2936 KB |
Output isn't correct |
| 6 |
Incorrect |
15 ms |
2048 KB |
Output isn't correct |
| 7 |
Incorrect |
17 ms |
2176 KB |
Output isn't correct |
| 8 |
Incorrect |
18 ms |
2176 KB |
Output isn't correct |
| 9 |
Correct |
31 ms |
3320 KB |
Output is correct |
| 10 |
Incorrect |
23 ms |
2688 KB |
Output isn't correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
3 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 |
3 ms |
1920 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 |
2 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 |
3 ms |
1536 KB |
Execution killed with signal 11 (could be triggered by violating memory limits) |
| 15 |
Runtime error |
3 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 |
1664 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) |
