Submission #394523

#	Time	Username	Problem	Language	Result	Execution time	Memory
394523		idk321	Detecting Molecules (IOI16_molecules)	C++11	100 / 100	68 ms	6180 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;


std::vector<int> find_subset(int l, int u, std::vector<int> w) {


    ll lsum = 0;
    ll rsum = 0;
    vector<int> res;
    vector<array<int, 2>> withIndex;
    for (int i = 0; i < w.size(); i++)
    {
        withIndex.push_back({w[i], i});
    }
    sort(withIndex.begin(), withIndex.end());
    for (int i = 0; i < withIndex.size(); i++)
    {
        lsum += withIndex[i][0];
        rsum += withIndex[withIndex.size() - 1 - i][0];
        if (lsum <= u && rsum >= l)
        {
            int a = 0;
            int b = a + i;
            while (res.size() < i + 1)
            {
                while (b + 1 < withIndex.size() && lsum - withIndex[a][0] + withIndex[b + 1][0] <= u)
                {
                    lsum = lsum - withIndex[a][0] + withIndex[b + 1][0];
                    a++;
                    b++;
                }
                res.push_back(withIndex[a][1]);
                a++;
            }

            break;
        }
    }

    return res;
}

/*

7
15 16
5 5 5 5 6 6 6
*/

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:14:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     for (int i = 0; i < w.size(); i++)
      |                     ~~^~~~~~~~~~
molecules.cpp:19:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     for (int i = 0; i < withIndex.size(); i++)
      |                     ~~^~~~~~~~~~~~~~~~~~
molecules.cpp:27:31: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   27 |             while (res.size() < i + 1)
      |                    ~~~~~~~~~~~^~~~~~~
molecules.cpp:29:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::array<int, 2> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |                 while (b + 1 < withIndex.size() && lsum - withIndex[a][0] + withIndex[b + 1][0] <= u)
      |                        ~~~~~~^~~~~~~~~~~~~~~~~~

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