// 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)
#pragma GCC optimize("Ofast,no-stack-protector,unroll-loops,fast-math")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
const int maxn = 70010, mod = 1e9 + 7, inf = 1e9 + 10;
int nxt[maxn][10], lst[10];
struct Hash{
int operator() (const pii &p)const{
return hash<ll>()( 1ll * p.F * maxn + p.S );
}
};
unordered_map<pii, int, Hash> 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] );
if(nxt[ poses[i] ][8] + 1000 < j)
return dp[{i, j}] = ans;
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();
dp.reserve(1<<17);
dp.max_load_factor(0.25);
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 |
11 ms |
5632 KB |
Output is correct |
| 2 |
Correct |
14 ms |
7936 KB |
Output is correct |
| 3 |
Correct |
6 ms |
5120 KB |
Output is correct |
| 4 |
Correct |
12 ms |
7936 KB |
Output is correct |
| 5 |
Correct |
14 ms |
7936 KB |
Output is correct |
| 6 |
Correct |
17 ms |
8020 KB |
Output is correct |
| 7 |
Correct |
22 ms |
7936 KB |
Output is correct |
| 8 |
Correct |
3 ms |
4200 KB |
Output is correct |
| 9 |
Correct |
2 ms |
4096 KB |
Output is correct |
| 10 |
Correct |
2 ms |
4096 KB |
Output is correct |
| 11 |
Correct |
4 ms |
4096 KB |
Output is correct |
| 12 |
Correct |
3 ms |
4096 KB |
Output is correct |
| 13 |
Correct |
10 ms |
5504 KB |
Output is correct |
| 14 |
Correct |
12 ms |
7936 KB |
Output is correct |
| 15 |
Correct |
6 ms |
5120 KB |
Output is correct |
| 16 |
Correct |
14 ms |
7936 KB |
Output is correct |
| 17 |
Correct |
14 ms |
7936 KB |
Output is correct |
| 18 |
Correct |
9 ms |
5760 KB |
Output is correct |
| 19 |
Correct |
9 ms |
5504 KB |
Output is correct |
| 20 |
Correct |
9 ms |
5632 KB |
Output is correct |
| 21 |
Correct |
12 ms |
7936 KB |
Output is correct |
| 22 |
Correct |
15 ms |
7936 KB |
Output is correct |
| 23 |
Correct |
12 ms |
5248 KB |
Output is correct |
| 24 |
Correct |
10 ms |
5376 KB |
Output is correct |
| 25 |
Correct |
10 ms |
5248 KB |
Output is correct |
| 26 |
Correct |
10 ms |
5632 KB |
Output is correct |
| 27 |
Correct |
15 ms |
7936 KB |
Output is correct |
| 28 |
Correct |
25 ms |
8016 KB |
Output is correct |
| 29 |
Correct |
24 ms |
7936 KB |
Output is correct |
| 30 |
Correct |
11 ms |
5760 KB |
Output is correct |
| 31 |
Correct |
11 ms |
5504 KB |
Output is correct |
| 32 |
Correct |
10 ms |
5632 KB |
Output is correct |
| 33 |
Correct |
11 ms |
5760 KB |
Output is correct |
| 34 |
Correct |
15 ms |
7936 KB |
Output is correct |
| 35 |
Correct |
15 ms |
7936 KB |
Output is correct |
| 36 |
Correct |
16 ms |
7936 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
588 ms |
174480 KB |
Output is correct |
| 2 |
Correct |
1064 ms |
342544 KB |
Output is correct |
| 3 |
Correct |
291 ms |
85408 KB |
Output is correct |
| 4 |
Correct |
593 ms |
174480 KB |
Output is correct |
| 5 |
Correct |
1072 ms |
342540 KB |
Output is correct |
| 6 |
Correct |
1169 ms |
342676 KB |
Output is correct |
| 7 |
Correct |
844 ms |
342672 KB |
Output is correct |
| 8 |
Correct |
677 ms |
177276 KB |
Output is correct |
| 9 |
Correct |
1128 ms |
342672 KB |
Output is correct |
| 10 |
Correct |
1014 ms |
342680 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
1914 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 2 |
Runtime error |
1421 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 3 |
Runtime error |
1621 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 4 |
Runtime error |
1390 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 5 |
Runtime error |
1754 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 6 |
Runtime error |
1478 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 7 |
Runtime error |
1475 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 8 |
Runtime error |
1646 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 9 |
Runtime error |
1520 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 10 |
Runtime error |
1522 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 11 |
Runtime error |
1376 ms |
524288 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 12 |
Runtime error |
1702 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 13 |
Runtime error |
1535 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 14 |
Runtime error |
1430 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 15 |
Runtime error |
1481 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 16 |
Runtime error |
1473 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 17 |
Runtime error |
1844 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 18 |
Runtime error |
1540 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 19 |
Runtime error |
1408 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 20 |
Runtime error |
1544 ms |
524292 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
