Submission #546239

#	Time	Username	Problem	Language	Result	Execution time	Memory
546239		Sergio_2357	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>

using namespace std;

#define ll int

std::vector<int> find_subset(int l, int u, vector<int> w)
{
    ll sum = 0;
    vector<ll> a = w;
    vector<int> us(n, 0);
    int n = a.size();
    sort(a.begin(), a.end());
    int s = 0;
    int e = n - 1;
    while (sum < l && e >= 0) {
        us[e] = 1;
        sum += a[e];
        e--;
    }
    e = n - 1;
    while (sum > u && s < e) {
        if (!us[e] || u[s])
            break;
        us[e] = 0;
        us[s] = 1;
        sum -= a[e];
        sum += a[s];
        e--;
        s++;
    }
    if (sum > l && sum < u) {
        vector<int> res;
        for (int i = 0; i < n; i++) {
            if (us[i])
                res.push_back(i);
        }
        return res;
    } else {
        return vector<int>(0);
    }
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:12:20: error: 'n' was not declared in this scope
   12 |     vector<int> us(n, 0);
      |                    ^
molecules.cpp:24:24: error: invalid types 'int[int]' for array subscript
   24 |         if (!us[e] || u[s])
      |                        ^