Submission #784941

#	Time	Username	Problem	Language	Result	Execution time	Memory
784941		Boas	Detecting Molecules (IOI16_molecules)	C++17	0 / 100	4 ms	8492 KiB

molecules

#include "molecules.h"

using namespace std;
#include <bits/stdc++.h>



#define MAX_N 200001

typedef vector<int> vi;

vi find_subset(int l, int u, vi w)
{
    unordered_map<int, int> lastAddition;
    unordered_multimap<int, bitset<MAX_N>> possible = {{0, {}}};
    for (int inx = 0; inx < w.size(); inx++)
    {
        int i = w[inx];
        for (const auto &[p, used] : possible)
        {
            if (used[inx])
                continue;
            int n = i + p;
            if (n > u)
                continue;
            lastAddition[n] = inx;
            if (n >= l && n <= u)
            {
                vi solution = {inx};
                int weightRemaining = p;
                while (weightRemaining > 0)
                {
                    solution.push_back(lastAddition[weightRemaining]);
                    weightRemaining -= w[lastAddition[weightRemaining]];
                }
                return solution;
            }
            bitset<MAX_N> newUsed(used);
            newUsed[inx] = true;
            possible.insert({n, newUsed});
        }
    }
    return vi(0);
}

Compilation message (stderr)

molecules.cpp: In function 'vi find_subset(int, int, vi)':
molecules.cpp:16:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for (int inx = 0; inx < w.size(); inx++)
      |                       ~~~~^~~~~~~~~~

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