Submission #1270497

#	Time	Username	Problem	Language	Result	Execution time	Memory
1270497		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<int> & w) {
    int n = (int) w.size();
    vector<pair<int, int>> a; 
    for (int i = 0; i < n; i++) a.push_back({ w[i], i });
    sort(a.begin(), a.end());

    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) {
            vector<int> ans;
            for (int k = i; k <= j; k++) ans.push_back(a[k].second);
            return ans;
        }
    }
    return {};
}

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<int> w(n);
    for (int i = 0; i < n; i++) cin >> w[i];

    vector<int> ans = find_subset(l, u, w);

    cout << (int) ans.size() << endl;
    if (!ans.empty()) {
        for (int i = 0; i < (int) ans.size(); i++) {
            if (i) cout << ' ';
            cout << ans[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/ccCkaUmY.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cc8b7fKg.o:molecules.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccCkaUmY.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