Submission #586276

#	Time	Username	Problem	Language	Result	Execution time	Memory
586276		tamthegod	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	18 ms	24276 KiB

messy

#include<bits/stdc++.h>
#include "messy.h"

#define pb push_back
#define fi first
#define se second
using namespace std;
using ll = long long;
using ld = long double;
using ull = unsigned long long;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 1e3 + 5;
const int mod = 1e9 + 7;
const ll oo = 1e18;
vector<int> P;
vector<int> vc[maxN][maxN];
string s;
int n;
void Prepair(int l, int r)
{
    if(l == r)
        return;
    int mid = (l + r) / 2;
    for(int i=l; i<=r; i++)
        s[i] = '0';
    for(int i=l; i<=mid; i++)
    {
        s[i] = '1';
        //cout << s << '\n';
        add_element(s);
        s[i] = '0';
    }
    for(int i=l; i<=r; i++)
        s[i] = '1';
    Prepair(l, mid);
    Prepair(mid + 1, r);
}
void DnC(int l, int r)
{
    //cout << s;exit(0);
    if(l == r)
        return;
    int mid = (l + r) / 2;
    for(int i=0; i<n; i++)
    {
        if(s[i] == '0')
        {
            //cout << s << '\n';
            s[i] = '1';
            if(check_element(s))
            {
               // cerr << s << "\n";
                vc[l][mid].pb(i);
            }
            else
                vc[mid + 1][r].pb(i);
            s[i] = '0';
        }
    }
    //  cerr << vc[l][mid].size() << " " << vc[mid + 1][r].size() << '\n';
    for(int i : vc[mid + 1][r])
        s[i] = '1';
    DnC(l, mid);
    for(int i : vc[mid + 1][r])
        s[i] = '0';
    for(int i : vc[l][mid])
        s[i] = '1';
    DnC(mid + 1, r);
    for(int i : vc[l][mid])
        s[i] = '0';
}
vector<int> restore_permutation(int _n, int w, int r)
{
    n = _n;
    P.resize(n);
    for(int i=0; i<n; i++)
        vc[0][n - 1].pb(i);
    for(int i=0; i<n; i++)
        s += '1';
    Prepair(0, n - 1);
    compile_set();
    for(int i=0; i<n; i++)
        s[i] = '0';
    DnC(0, n - 1);
   // cout << vc[0][0].size();exit(0);
    for(int i=0; i<n; i++)
    {
         //cout << i << " ";
        P[vc[i][i][0]] = i;
    }
    return P;
}
/*void Solve()
{

}
int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    ReadInput();
    Solve();
}*/

• Subtask 1: 20 / 20
• Subtask 2: 18 / 18
• Subtask 3: 11 / 11
• Subtask 4: 21 / 21
• Subtask 5: 30 / 30