Submission #867168

#	Time	Username	Problem	Language	Result	Execution time	Memory
867168		StefanL2005	Detecting Molecules (IOI16_molecules)	C++14	Compilation error	0 ms	0 KiB

molecules

#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <set>
using namespace std;
#define ll long long

int find_subset(int l, int u, vector<int> w, int n, vector<int> &result)
{
    set<int> Set;
 
    sort(w.begin(), w.end());
 
    if(l < w[0])
        return 0;
    if (l - u < w[n-1] - w[0])
        return 0;

    ll sum = 0;
    int i = 0;
    for (i; i < n; i++)
    {
        if (sum + w[i] > l)
            break;
        
        sum+= w[i];
        Set.insert(w[i]);
        
    }

    int dif = l - sum;

    while (i < n && !(u <= sum && sum <= l))
    {
        auto poz = Set.lower_bound(w[i] - dif);
        if (poz == Set.end())
            break;
 
        sum= sum - *poz + w[i];
        Set.erase(poz);
        Set.insert(w[i]);
        i++;
    }
 
    if (u <= sum && sum <= l)
    {
        auto p = Set.begin();
        for(i = 0; i < n; i++)
            if (w[i] == *p)
            {
                result.push_back(i);
                Set.erase(p);
                p = Set.begin();
            }
    }
    return result.size();
}

Compilation message (stderr)

molecules.cpp: In function 'int find_subset(int, int, std::vector<int>, int, std::vector<int>&)':
molecules.cpp:22:10: warning: statement has no effect [-Wunused-value]
   22 |     for (i; i < n; i++)
      |          ^
/usr/bin/ld: /tmp/cckswwRJ.o: in function `main':
grader.cpp:(.text.startup+0x18d): undefined reference to `find_subset(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status