Submission #1270504

#	Time	Username	Problem	Language	Result	Execution time	Memory
1270504		SnowRaven52	Detecting Molecules (IOI16_molecules)	C++20	Compilation error	0 ms	0 KiB

molecules

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

vector<int> find_subset(long long l, long long u, const vector<long long>& w) {
    int n = w.size();
    vector<pair<long long, int>> a;
    for (int i = 0; i < n; i++) a.push_back({w[i], i});
    sort(a.begin(), a.end());
    vector<int> r;
    long long s = 0;
    int i = 0;
    for (int j = 0; j < n; j++) {
        s += a[j].first;
        while (s > u && i <= j) { s -= a[i].first; i++; }
        if (l <= s && s <= u) {
            for (int k = i; k <= j; k++) r.push_back(a[k].second);
            return r;
        }
    }
    return r;
}

int main() {
  // freopen("main.in", "r", stdin);
	// freopen(".out", "w", stdout);
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    long long l, u; cin >> n >> l >> u;
    vector<long long> w(n);
    for (int i = 0; i < n; i++) cin >> w[i];
    auto r = find_subset(l, u, w);
    for (int i = 0; i < (int)r.size(); i++) {
        if (i) cout << ' ';
        cout << r[i];
    }
    cout << endl;
}

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/ccINsmFC.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc1S9nre.o:molecules.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccINsmFC.o: in function `main':
grader.cpp:(.text.startup+0x165): undefined reference to `find_subset(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status