Submission #1151426

#	Time	Username	Problem	Language	Result	Execution time	Memory
1151426		irmuun	Group Photo (JOI21_ho_t3)	C++20	5 / 100	5092 ms	528 KiB

Main

#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()

int main(){
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    int n;
    cin>>n;
    int p[n+5];
    for(int i=1;i<=n;i++){
        cin>>p[i];
    }
    int b[n+5];
    iota(b+1,b+n+1,1);
    int ans=1e9;
    do{
        int cur=0;
        bool ok=true;
        int a[n+5];
        for(int i=1;i<=n;i++){
            a[i]=p[i];
            if(i>1){
                ok&=(b[i-1]<b[i]+2);
            }
        }
        if(!ok) continue;
        for(int i=1;i<=n;i++){
            for(int j=1;j<=n;j++){
                if(a[j]==b[i]){
                    for(int k=j-1;k>=i;k--){
                        cur++;
                        swap(a[k],a[k+1]);
                    }
                    break;
                }
            }
        }
        ans=min(ans,cur);
    }while(next_permutation(b+1,b+n+1));
    cout<<ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 32
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36