Submission #93191

#	Time	Username	Problem	Language	Result	Execution time	Memory
93191		abood101	Pancake (NOI12_pancake)	C++17	12 / 25	6 ms	376 KiB

pancake

#include <bits/stdc++.h>
using namespace std;

typedef pair<int,int > pp;
typedef long long ll;

int const N=3e5+10,oo=1e9,M=1e6+2;
ll const OO=1e18;
double const eps=1e-6,PI=acos(-1);
int mod=oo+7;

vector<int > v,o;
int n;

int solve(int idx){
    if(idx==n)return 0;
    if(v[idx]==o[idx])return solve(idx+1);
    int mn=oo;
    for(int j=idx+1;j<n;j++)if(v[j]==o[idx]){
        reverse(v.begin()+j,v.end());
        reverse(v.begin()+idx,v.end());
        mn=min(mn,solve(idx+1)+1+(j!=n-1));
        reverse(v.begin()+idx,v.end());        
        reverse(v.begin()+j,v.end());
    }
    return mn;
}
int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t;
    cin>>t;
    while(t--){
        cin>>n;
        v.clear();
        v.resize(n);
        for(int i=0;i<n;i++)cin>>v[i];
        o=v;
        sort(o.begin(),o.end());
        int an=solve(0)+1;
        reverse(o.begin(),o.end());
        an=min(an,solve(0));
        cout<<an<<'\n';
    }
    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 4 / 4
• Subtask 3: 4 / 4
• Subtask 4: 0 / 8
• Subtask 5: 0 / 5