#include<bits/stdc++.h>
//#pragma GCC optimize("O3")
//#pragma GCC optimize("unroll-loops")
using namespace std;
#define int long long
#define pb push_back
#define fore(i , n) for(int i = 0 ; i<n;i++)
#define forr(i , x , y) for(int i = x ; i <= y; i++)
#define forn(i , x , y) for(int i = x ; i >= y; i--)
#define nl '\n'
signed main() {
ios::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
// double n;
// cin>>n;
string s;
cin>>s;
double n = (double)s.size();
cout<<fixed<<setprecision(5);
cout<<(n - 1)*(n-1) / 8.0<<nl;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
found '100800.5000000000', expected '100800.5000000000', error '0.0000000000' |
2 |
Correct |
0 ms |
348 KB |
found '0.0000000000', expected '0.0000000000', error '-0.0000000000' |
3 |
Incorrect |
0 ms |
348 KB |
1st numbers differ - expected: '0.0000000000', found: '0.1250000000', error = '0.1250000000' |
4 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
0 ms |
348 KB |
1st numbers differ - expected: '1.0000000000', found: '3.1250000000', error = '2.1250000000' |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Incorrect |
0 ms |
348 KB |
1st numbers differ - expected: '1.0000000000', found: '3.1250000000', error = '2.1250000000' |
2 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
found '100800.5000000000', expected '100800.5000000000', error '0.0000000000' |
2 |
Correct |
0 ms |
348 KB |
found '0.0000000000', expected '0.0000000000', error '-0.0000000000' |
3 |
Incorrect |
0 ms |
348 KB |
1st numbers differ - expected: '0.0000000000', found: '0.1250000000', error = '0.1250000000' |
4 |
Halted |
0 ms |
0 KB |
- |