Submission #1263639

#	Time	Username	Problem	Language	Result	Execution time	Memory
1263639		piolk	Detecting Molecules (IOI16_molecules)	C++20	Compilation error	0 ms	0 KiB

molecules

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

using ll=long long;

vector<int> find_subset(int l,int r,vector<ll> w){
    unordered_map<int,vector<int>> wyst; // value,index
    for (int i=0;i<w.size();i++) wyst[w[i]].push_back(i);
    sort(w.begin(),w.end());
    int n=w.size();

    int R=-1;
    int L=0;

    ll sum=0;

    while (R<n-1){
        R++;
        sum+=w[R];

        while (sum>r && L<R){
            sum-=w[L];
            L++;
        }

        if (sum>=l && sum<=r){
            vector<int> indices;
            for (int i=L;i<=R;i++){
                int index=wyst[w[i]].back();
                wyst[w[i]].pop_back();
                indices.push_back(index);
            }
            return indices;
        }
    }

    return {};
}

Compilation message (stderr)

molecules.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
molecules_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
/usr/bin/ld: /tmp/ccJQklec.o: in function `main':
grader.cpp:(.text.startup+0x173): undefined reference to `find_subset(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status