Submission #1185665

#	Time	Username	Problem	Language	Result	Execution time	Memory
1185665		nikaa123	Detecting Molecules (IOI16_molecules)	C++20	Compilation error	0 ms	0 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
#define int long long 
using namespace std;

vector<int> find_subset(int l, int u, vector<int> a) {

    int n = a.size();
    vector <pair<int,int>> w;
    w.insert(w.begin(),{0,0});
    for (int i = 0; i < n; i++) {
        w.push_back({a[i],i});
    }

    sort(w.begin(),w.end());
    int pref[n+5],suff[n+5];
    pref[0]=suff[0]=0;
    for (int i = 1; i <= n; i++) {
        pref[i] = pref[i-1] + w[i].first;
    }
    for (int i = n; i >= 1; i--) {
        suff[n-i+1] = suff[n-i]+w[i].first;
    }
    int k=-9,p;
    for (int i = 1; i <= n; i++) {
        if (pref[i] <= u && suff[i] >= l) {
            k = i;
            break;
        }
    }
    if (k==-9) return vector<int>(0);
    for (int i = 0; i <= k; i++) {
        int num = pref[i]+suff[k-i];
        if (l <= num && num <= u) {
            p = i;
            break;
        }
    }
    vector <int> v;
    for (int i = 1; i <= p; i++) {
        v.push_back(w[i].second);
    }
    for (int i = n; i >= n-k+p+1; i--) {
        v.push_back(w[i].second);
    }
    sort(v.begin(),v.end());
    
    return v;
}

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/ccMyUCrr.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