Submission #44839

#	Time	Username	Problem	Language	Result	Execution time	Memory
44839		RayaBurong25_1	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	86 ms	25872 KiB

molecules

#include "molecules.h"
#include <stdio.h>
#include <algorithm>
int compare(std::pair<long long, int> a, std::pair<long long, int> b)
{
    return (a.first < b.first || (a.first == b.first && a.second < b.second));
}
std::vector<int> find_subset(int l, int u, std::vector<int> w) {
    std::vector<std::pair<long long, int> > W;
    std::vector<int> V;
    int n = w.size(), i, j;
    long long mn = 0, mx = 0;
    for (i = 0; i < n; i++)
        W.push_back({w[i], i});
    std::sort(W.begin(), W.end(), compare);
    for (i = 0; i < n; i++)
    {
        mn += W[i].first;
        mx += W[n - 1 - i].first;
        // printf("mn %d mx %d\n", mn, mx);
        if ((l <= mx && mx <= u) || (l <= mn && mn <= u) || (mn <= l && u <= mx))
            break;
    }
    if (i == n)
        return V;
    for (j = 0; j <= i; j++)
        V.push_back(j);
    while (mn < l)
    {
        if (V[i] == n - (j - i))
            i--;
        mn -= W[V[i]].first;
        V[i] = n - (j - i);
        mn += W[V[i]].first;
    }
    for (i = 0; i < V.size(); i++)
        V[i] = W[V[i]].second;
    return V;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:36:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (i = 0; i < V.size(); i++)
                 ~~^~~~~~~~~~

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