#include <bits/stdc++.h>
#ifndef _DEBUG
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx")
#endif
using namespace std;
signed main()
{
cin.tie(0);
ios_base::sync_with_stdio(false);
string s;
cin >> s;
int n = s.size();
int g = *max_element(s.begin(), s.end()) - 'A' + 1;
vector<int> a(n);
vector<vector<int>> pos(g);
for (int i = 0; i < n; i++)
pos[a[i] = s[i] - 'A'].push_back(i);
vector<vector<int>> prefix(1 << g, vector<int>(n));
vector<vector<int>> suffix(1 << g, vector<int>(n));
for (int k = 0; k < 1 << g; k++)
{
for (int i = 1; i < n; i++)
prefix[k][i] = prefix[k][i - 1] + bool(1 << a[i - 1] & k);
for (int i = n - 2; i >= 0; i--)
suffix[k][i] = suffix[k][i + 1] + bool(1 << a[i + 1] & k);
}
vector<int> dp(1 << g, 1e20);
dp[0] = 0;
for (int b = 1; b < 1 << g; b++)
{
for (int i = 0; i < g; i++)
{
if (!(b & (1 << i)))
continue;
int cost = 0;
for (int p : pos[i])
{
cost += min(2 * prefix[b][p] - prefix[(1 << i)][p], 2 * suffix[b][p] - suffix[(1 << i)][p]);
}
dp[b] = min(dp[b], dp[b ^ (1 << i)] + cost);
}
}
cout << setprecision(15) << dp.back() * 0.5;
}
Compilation message
passes.cpp: In function 'int main()':
passes.cpp:39:28: warning: overflow in conversion from 'double' to 'std::vector<int>::value_type' {aka 'int'} changes value from '1.0e+20' to '2147483647' [-Woverflow]
39 | vector<int> dp(1 << g, 1e20);
| ^~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
340 KB |
Output is correct |
6 |
Correct |
3 ms |
2652 KB |
Output is correct |
7 |
Incorrect |
4 ms |
3104 KB |
Output isn't correct |
8 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
284 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
1 ms |
340 KB |
Output is correct |
5 |
Correct |
1 ms |
340 KB |
Output is correct |
6 |
Correct |
1 ms |
340 KB |
Output is correct |
7 |
Correct |
1 ms |
340 KB |
Output is correct |
8 |
Correct |
1 ms |
340 KB |
Output is correct |
9 |
Correct |
0 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
340 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
0 ms |
340 KB |
Output is correct |
15 |
Correct |
0 ms |
340 KB |
Output is correct |
16 |
Correct |
0 ms |
340 KB |
Output is correct |
17 |
Correct |
0 ms |
340 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
284 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
1 ms |
340 KB |
Output is correct |
5 |
Correct |
1 ms |
340 KB |
Output is correct |
6 |
Correct |
1 ms |
340 KB |
Output is correct |
7 |
Correct |
1 ms |
340 KB |
Output is correct |
8 |
Correct |
1 ms |
340 KB |
Output is correct |
9 |
Correct |
0 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
1 ms |
340 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
0 ms |
340 KB |
Output is correct |
15 |
Correct |
0 ms |
340 KB |
Output is correct |
16 |
Correct |
0 ms |
340 KB |
Output is correct |
17 |
Correct |
0 ms |
340 KB |
Output is correct |
18 |
Correct |
0 ms |
212 KB |
Output is correct |
19 |
Correct |
0 ms |
212 KB |
Output is correct |
20 |
Correct |
1 ms |
340 KB |
Output is correct |
21 |
Correct |
1 ms |
340 KB |
Output is correct |
22 |
Correct |
1 ms |
340 KB |
Output is correct |
23 |
Correct |
0 ms |
212 KB |
Output is correct |
24 |
Correct |
1 ms |
340 KB |
Output is correct |
25 |
Correct |
0 ms |
340 KB |
Output is correct |
26 |
Correct |
0 ms |
340 KB |
Output is correct |
27 |
Correct |
0 ms |
340 KB |
Output is correct |
28 |
Correct |
0 ms |
340 KB |
Output is correct |
29 |
Correct |
1 ms |
340 KB |
Output is correct |
30 |
Correct |
1 ms |
340 KB |
Output is correct |
31 |
Correct |
1 ms |
340 KB |
Output is correct |
32 |
Correct |
0 ms |
340 KB |
Output is correct |
33 |
Correct |
1 ms |
340 KB |
Output is correct |
34 |
Correct |
1 ms |
340 KB |
Output is correct |
35 |
Correct |
21 ms |
20436 KB |
Output is correct |
36 |
Correct |
20 ms |
20436 KB |
Output is correct |
37 |
Correct |
80 ms |
80588 KB |
Output is correct |
38 |
Correct |
76 ms |
80628 KB |
Output is correct |
39 |
Correct |
82 ms |
80600 KB |
Output is correct |
40 |
Correct |
86 ms |
80360 KB |
Output is correct |
41 |
Correct |
86 ms |
78936 KB |
Output is correct |
42 |
Correct |
82 ms |
79004 KB |
Output is correct |
43 |
Correct |
81 ms |
79032 KB |
Output is correct |
44 |
Correct |
84 ms |
78920 KB |
Output is correct |
45 |
Correct |
83 ms |
78940 KB |
Output is correct |
46 |
Correct |
92 ms |
79004 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
1 ms |
340 KB |
Output is correct |
6 |
Correct |
3 ms |
2652 KB |
Output is correct |
7 |
Incorrect |
4 ms |
3104 KB |
Output isn't correct |
8 |
Halted |
0 ms |
0 KB |
- |