Submission #250204

#	Time	Username	Problem	Language	Result	Execution time	Memory
250204		dwsc	Minerals (JOI19_minerals)	C++14	100 / 100	105 ms	4372 KiB

minerals

#include "minerals.h"
#include <bits/stdc++.h>
using namespace std;
int n;
int in[100010];
void solve(vector<int> v1,vector<int> v2,bool in1){
    random_shuffle(v1.begin(),v1.end());
    random_shuffle(v2.begin(),v2.end());
    if (v1.size() == 1){
        Answer(v1[0],v2[0]);
        return;
    }
    int stop = max((int)(v1.size()*0.382),1);
    vector<int> v1a,v1b,v2a,v2b;
    int num;
    for (int i = 0; i < v1.size(); i++){
        if (i < stop){
            num = Query(v1[i]);
            //if (in[v1[i]]) cout << "Added" << " " << v1[i] << "\n";
            //else cout << "Removed" << " " << v1[i] << "\n";
            v1a.push_back(v1[i]);
        }
        else{
            v1b.push_back(v1[i]);
        }
    }
    for (int i = 0; i < v2.size(); i++){
        if (v2a.size() == stop){
            v2b.push_back(v2[i]);
            continue;
        }
        if (v2b.size() == v2.size()-stop){
            v2a.push_back(v2[i]);
            continue;
        }
        int temp = Query(v2[i]);
        if (in1 && in[v2[i]]){
            if (temp < num) v2a.push_back(v2[i]);
            else v2b.push_back(v2[i]);
        }
        else if (in1 && !in[v2[i]]){
            if (temp > num) v2a.push_back(v2[i]);
            else v2b.push_back(v2[i]);
        }
        else if (!in1 && in[v2[i]]){
            if (temp == num) v2a.push_back(v2[i]);
            else v2b.push_back(v2[i]);
        }
        else{
            if (temp == num) v2a.push_back(v2[i]);
            else v2b.push_back(v2[i]);
        }
        in[v2[i]] = 1-in[v2[i]];
        num = temp;
    }
    solve(v1a,v2a,!in1);
    solve(v1b,v2b,in1);
}
void Solve(int N) {
    srand(3082);
    n = N;
    vector<int> v1,v2;
    int num = 0;
    for (int i = 1; i <= 2*N; i++){
        if (v1.size() == N){
            v2.push_back(i);
            continue;
        }
        int temp = Query(i);
        in[i] = 1;
        if (temp > num){
            num++;
            v1.push_back(i);
        }
        else{
            v2.push_back(i);
        }
    }
    solve(v1,v2,1);
}

Compilation message (stderr)

minerals.cpp: In function 'void solve(std::vector<int>, std::vector<int>, bool)':
minerals.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < v1.size(); i++){
                     ~~^~~~~~~~~~~
minerals.cpp:27:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < v2.size(); i++){
                     ~~^~~~~~~~~~~
minerals.cpp:28:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (v2a.size() == stop){
             ~~~~~~~~~~~^~~~~~~
minerals.cpp: In function 'void Solve(int)':
minerals.cpp:65:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (v1.size() == N){
             ~~~~~~~~~~^~~~
minerals.cpp: In function 'void solve(std::vector<int>, std::vector<int>, bool)':
minerals.cpp:38:13: warning: 'num' may be used uninitialized in this function [-Wmaybe-uninitialized]
             if (temp < num) v2a.push_back(v2[i]);
             ^~

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