Submission #527001

#	Time	Username	Problem	Language	Result	Execution time	Memory
527001		lcs147	Detecting Molecules (IOI16_molecules)	C++98	Compilation error	0 ms	0 KiB

molecules

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

vector<int>find_subset(int l, int r, vector<int> w) {
    if(l > r) return {};

    vector<int>id(w.size());
    iota(id.begin(), id.end(), 0);
    sort(id.begin(), id.end(), [&](int a, int b){
        return w[a] < w[b];
    });
    while(id.size() && w[id.back()] > r) id.pop_back();

    int sum = 0;
    vector<int>has_sum(r+1, -1);
    int en = -1;
    while(1) {
        if(sum != 0) {
            while(sum <= r && has_sum[sum]==-1) sum++;
        }
        if(sum > r) return {};
        if(sum >= l) {
            en = sum;
            break;
        }

        for(int i = has_sum[sum]+1; i<id.size(); i++) {
            int nsum = sum + w[id[i]];
            if(nsum > r) break;
            has_sum[nsum] = i;
        }
        sum++;
    }

    sum = en;
    vector<int>res;
    while(sum > 0) {
        int rid = id[has_sum[sum]];
        res.push_back(rid);
        sum -= w[rid];
    }
    sort(res.begin(), res.end());
    return res;
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    #define endl '\n'

    int n, l, r; cin >> n >> l >> r;

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

    auto res = find_subset(l, r, w);
    
    for(int x:res) cout << x << " ";
    cout << endl;

    return 0;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:28:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         for(int i = has_sum[sum]+1; i<id.size(); i++) {
      |                                     ~^~~~~~~~~~
/usr/bin/ld: /tmp/ccFMqYJx.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccAuNRRy.o:molecules.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status