Submission #870134

#	Time	Username	Problem	Language	Result	Execution time	Memory
870134		Ahmed_Solyman	Boarding Passes (BOI22_passes)	C++14	30 / 100	2063 ms	1308 KiB

passes

/*
In the name of Allah
made by: Ahmed_Solyman
*/
#include <bits/stdc++.h>
#include <ext/rope>
 
using namespace std;
using namespace __gnu_cxx;
#pragma GCC optimize("-Ofast")
#pragma GCC optimize("-O1")
//-------------------------------------------------------------//
typedef long long ll;
typedef unsigned long long ull;
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define PI acos(-1)
#define lb lower_bound
#define ub upper_bound
#define endl '\n'
#define all(v) v.begin(),v.end()
#define allr(v) v.rbegin(),v.rend()
#define sum_to(n) (n*(n+1))/2
#define pb push_back
#define pf push_front
#define fil(arr,x) memset(arr,x,sizeof(arr))
const ll mod=1e9+7;
int dx[8]={0,1,0,-1,1,1,-1,-1};
int dy[8]={1,0,-1,0,1,-1,-1,1};
//-------------------------------------------------------------//
ll lcm(ll a,ll b)
{
    return (max(a,b)/__gcd(a,b))*min(a,b);
}
void person_bool(bool x)
{
    cout<<(x?"YES":"NO")<<endl;
}
int main()
{
    //freopen("input.txt","r",stdin);
    //freopen("output.txt","w",stdout);
    #ifndef ONLINE_JUDGE
    //freopen("input.in", "r", stdin);
    //freopen("output.out", "w", stdout);
    #endif
    fast
    string s;cin>>s;
    vector<int>g[15];
    int i=0;
    int mx=0;
    for(char c:s){
        mx=max(mx,c-'A');
        g[c-'A'].push_back(i++);
    }
    vector<int>v;
    for(int i=0;i<=mx;i++)v.push_back(i);
    double ans=4e18;
    do{
        double p=0;
        for(int c=0;c<=mx;c++){
            for(int j=0;j<g[v[c]].size();j++){
                int a=0,b=0;
                for(int k=0;k<c;k++){
                    for(auto h:g[v[k]]){
                        a+=h<g[v[c]][j];
                        b+=h>g[v[c]][j];
                    }
                }
                p+=min(a+j/2.0,b+(g[v[c]].size()-j-1)/2.0);
            }
        }
        ans=min(ans,p);
    }while(next_permutation(all(v)));
    cout<<fixed<<setprecision(6)<<ans<<" ";
    return 0;
}

Compilation message (stderr)

passes.cpp: In function 'int main()':
passes.cpp:61:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |             for(int j=0;j<g[v[c]].size();j++){
      |                         ~^~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 25 / 25
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40