#include <bits/stdc++.h>
using namespace std ;
const int MAX = 100 + 10 ;
int arr[MAX] , mark[MAX] ;
int n ;
long double pref[MAX] , suff[MAX] ;
string s ;
long double calc(int x)
{
long double sum = 0 ;
for(int i = 0 ; i < x ; ++i)
sum += 0.5 * i ;
return sum ;
}
vector<int>occ[30] ;
int main()
{
ios_base::sync_with_stdio(0) ;
cin.tie(0) ;
cin>>s ;
n = s.size() ;
for(int i = 0 ; i < n ; ++i)
occ[s[i]-'A'].push_back(i) ;
vector<char>v ;
for(int i = 'A' ; i < 'A'+7 ; ++i)
v.push_back(i) ;
long double ans = 1e18 ;
do
{
for(int i = 0 ; i < n ; ++i)
mark[i] = pref[i] = suff[i] = 0 ;
long double ex = 0 ;
for(auto &c : v)
{
if(!occ[c-'A'].size())
continue ;
long double cnt = 0 , cnt2 = 0 ;
int last = -1 ;
for(int i = 0 ; i < n ; ++i)
{
cnt += mark[i] ;
if(s[i] != c)
continue ;
pref[i] = cnt + 0.5 * cnt2 ;
if(last != -1)
pref[i] += pref[last] ;
++cnt2 , last = i ;
}
cnt = 0 , cnt2 = 0 , last = -1 ;
for(int i = n-1 ; i >= 0 ; --i)
{
cnt += mark[i] ;
if(s[i] != c)
continue ;
suff[i] = cnt + 0.5 * cnt2 ;
if(last != -1)
suff[i] += suff[last] ;
++cnt2 , last = i ;
mark[i] = 1 ;
}
int sz = occ[c-'A'].size() ;
long double Min = suff[occ[c-'A'][0]] ;
for(int i = 0 ; i < sz-1 ; ++i)
Min = min(Min , pref[occ[c-'A'][i]] + suff[occ[c-'A'][i+1]]) ;
ex += Min ;
}
ans = min(ans , ex) ;
}while(next_permutation(v.begin() , v.end())) ;
return cout<<fixed<<setprecision(12)<<ans<<"\n" , 0 ;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
1 ms |
468 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
found '1.0000000000', expected '1.0000000000', error '0.0000000000' |
2 |
Correct |
11 ms |
212 KB |
found '1225.0000000000', expected '1225.0000000000', error '0.0000000000' |
3 |
Correct |
21 ms |
320 KB |
found '1023.0000000000', expected '1023.0000000000', error '0.0000000000' |
4 |
Correct |
19 ms |
324 KB |
found '294.0000000000', expected '294.0000000000', error '0.0000000000' |
5 |
Incorrect |
20 ms |
212 KB |
1st numbers differ - expected: '1087.0000000000', found: '1339.0000000000', error = '0.2318307268' |
6 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
found '1.0000000000', expected '1.0000000000', error '0.0000000000' |
2 |
Correct |
11 ms |
212 KB |
found '1225.0000000000', expected '1225.0000000000', error '0.0000000000' |
3 |
Correct |
21 ms |
320 KB |
found '1023.0000000000', expected '1023.0000000000', error '0.0000000000' |
4 |
Correct |
19 ms |
324 KB |
found '294.0000000000', expected '294.0000000000', error '0.0000000000' |
5 |
Incorrect |
20 ms |
212 KB |
1st numbers differ - expected: '1087.0000000000', found: '1339.0000000000', error = '0.2318307268' |
6 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Runtime error |
1 ms |
468 KB |
Execution killed with signal 11 |
2 |
Halted |
0 ms |
0 KB |
- |