Submission #824606

#	Time	Username	Problem	Language	Result	Execution time	Memory
824606		LucaIlie	Minerals (JOI19_minerals)	C++17	40 / 100	18 ms	2592 KiB

minerals

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

using namespace std;

const int MAX_N = 43000;
const int UNDEF = -1;
int pairr[2 * MAX_N + 1];

void solve( vector <int> &v ) {
    int n = v.size() / 2;
    vector<int> left, right;

    if ( n == 1 ) {
        pairr[v[0]] = v[1];
        pairr[v[1]] = v[0];
        return;
    }

    for ( int i: v ) {
        int ans = Query( i );
        if ( ans > n / 2 ) {
            right.push_back( i );
            Query( i );
        } else
            left.push_back( i );
    }
    for ( int i: left )
        Query( i );

    solve( left );
    solve( right );
}

void Solve( int n ) {
    vector<int> v;
    for ( int i = 1; i <= 2 * n; i++ ) {
        pairr[i] = UNDEF;
        v.push_back( i );
    }

    solve( v );
    for ( int i = 1; i <= 2 * n; i++ ) {
        if ( pairr[i] < i )
            Answer( i, pairr[i] );
    }
}

• Subtask 1: 6 / 6
• Subtask 2: 25 / 25
• Subtask 3: 9 / 9
• Subtask 4: 0 / 30
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 0 / 5
• Subtask 9: 0 / 10