제출 #841353

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
841353		LucaIlie	Minerals (JOI19_minerals)	C++17	40 / 100	22 ms	2636 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], perm[2 * MAX_N + 1];
bool inSet[2 * MAX_N + 1];
vector<int> firstt, secondd;
int ans = 0;

void solve( int n ) {
    for ( int b = log2( n ); b >= 0; b-- ) {
        for ( int i = 0; i < n; i++ ) {
            if ( (i & (1 << b)) ) {
                if ( !inSet[firstt[i]] ) {
                    ans = Query( firstt[i] );
                    inSet[firstt[i]] = true;
                }
            } else {
                if ( inSet[firstt[i]] ) {
                    ans = Query( firstt[i] );
                    inSet[firstt[i]] = false;
                }
            }
        }

        for ( int i = 0; i < n; i++ ) {
            int prevAns = ans;
            ans = Query( secondd[i] );
            inSet[secondd[i]] ^= 1;

            if ( ans == prevAns )
                pairr[secondd[i]] += (1 << b);
        }
    }
}

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

    int prevAns = 0;
    for ( int i = 1; i <= 2 * n; i++ ) {
        ans = Query( perm[i] );
        inSet[i] = true;
        if ( ans > prevAns )
            firstt.push_back( perm[i] );
        else
            secondd.push_back( perm[i] );
        prevAns = ans;
    }

    solve( n );

    for ( int i = 0; i < n; i++ ) 
        Answer( secondd[i], firstt[pairr[secondd[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