Submission #218538

#	Time	Username	Problem	Language	Result	Execution time	Memory
218538		emil_physmath	Detecting Molecules (IOI16_molecules)	C++17	46 / 100	1090 ms	25164 KiB

molecules

#include "molecules.h"
#include <iostream>
#include <bitset>
#include <vector>
using namespace std;

bitset<10001> dp[10001], take[10001];

vector<int> find_subset(int l, int u, vector<int> w)
{
    int n = w.size();
    dp[0][0] = dp[0][w[0]] = true;
    take[0][w[0]] = true;
    for (int i = 1; i < n; ++i)
    {
        dp[i][0] = true;
        take[i][0] = false;
        for (int j = 1; j <= u; ++j)
            if (dp[i - 1][j])
            {
                take[i][j] = false;
                dp[i][j] = true;
            }
            else if (j - w[i] >= 0 && dp[i - 1][j - w[i]])
            {
                take[i][j] = true;
                dp[i][j] = true;
            }
    }
    for (int j = l; j <= u; ++j)
        if (dp[n - 1][j])
        {
            vector<int> res;
            for (int i = n - 1; i >= 0; --i)
                if (take[i][j])
                {
                    res.push_back(i);
                    j -= w[i];
                }
            return res;
        }
    return vector<int>(0);
}

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31