제출 #1343212

#제출 시각아이디문제언어결과실행 시간메모리
1343212NipphitchGroup Photo (JOI21_ho_t3)C++20
0 / 100
1776 ms2162688 KiB
#include <bits/stdc++.h>
using namespace std;
const int N=5005;

int n,a[N],ans;
queue <pair <int,vector <int>>> q;

signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin >> n;
    for(int i=1;i<=n;i++) cin >> a[i];
    vector <int> tmp;
    for(int i=1;i<=n;i++) tmp.push_back(a[i]);
    q.push({0,tmp});
    while(!q.empty()){
        auto [d_u,u]=q.front();
        q.pop();
        bool ok=true;
        for(int i=0;i+1<n;i++) if(u[i+1]+2<=u[i]) ok=false;
        if(ok){
            cout << d_u;
            break;
        }
        for(int i=0;i+1<n;i++){
            swap(u[i],u[i+1]);
            q.push({d_u+1,u});
            swap(u[i],u[i+1]);
        }
    }
}
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