Submission #849628

#	Time	Username	Problem	Language	Result	Execution time	Memory
849628		Bach21	Detecting Molecules (IOI16_molecules)	C++14	Compilation error	0 ms	0 KiB

molecules

#include <bits/stdc++.h>
#include "molecules.h"
using namespace std;
#define int long long
const int nmax=2e5+5;
vector<int> find_subset(int l, int u, vector<int> w)
{
    pair<int,int> w1[nmax];
    for (int i=0;i<w.size();i++)
    {
        w1[i].first=w[i];
        w1[i].second=i+1;
    }
    sort(w1,w1+w.size(),greater<pair<int,int>>());
    int l1=0;
    int r=w.size()-1;
    int tmp=0;
    while (r>l1)
    {
        if (tmp+w1[l1].first<=l)
        {
            tmp+=w1[l1].first;
            l1++;
        } else if (tmp+w1[l1].first>=l && tmp+w1[l1].first<=u)
        {
            tmp+=w1[l1].first;
            l1++;
        } else if (tmp+w1[l1].first>=u)
        {
            while (tmp<l)
            {
                tmp+=w1[r].first;
                r--;
            }
            while (tmp>u)
            {
                tmp-=w1[l1].first;
                l1--;
            }
        }
        if (tmp<=u && tmp>=l) break;
    }
    if (tmp<u || tmp>l) return {};
    vector<int> res;
    for (int i=0;i<=l1;i++)
    {
        res.push_back(w1[i].second);
    }
    for (int i=r;i<w.size();i++)
    {
        res.push_back(w1[i].second);
    }
    return res;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<long long int> find_subset(long long int, long long int, std::vector<long long int>)':
molecules.cpp:9:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for (int i=0;i<w.size();i++)
      |                  ~^~~~~~~~~
molecules.cpp:49:19: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for (int i=r;i<w.size();i++)
      |                  ~^~~~~~~~~
/usr/bin/ld: /tmp/ccW0hFN7.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