Submission #853711

#	Time	Username	Problem	Language	Result	Execution time	Memory
853711		thinknoexit	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

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

vector<int> find_subset(int l, int u, vector<int> w) {
    int n = w.size();
    pair<int, int> a[n];
    ll sum = 0;
    for (int i = 0;i < n;i++) {
        sum += w[i];
        a[i] = { w[i],i };
    }
    sort(a, a + n);
    deque<int> dq;
    vector<int> ans;
    for (int i = 0;i < n;) {
        if (l <= sum && sum <= u) break;
        if (sum > u) {
            sum -= a[dq.front()].first;
            dq.pop_front();
            continue;
        }
        else if (sum < l) {
            sum += a[i].first;
            dq.push_back(i);
            i++;
        }
    }
    while (sum > u) {
        sum -= a[dq.front()].firstr;
        dq.pop_front();
    }
    while (!dq.empty() && (l <= sum && sum <= u)) {
        ans.push_back(a[dq.front()].second);
        dq.pop_front();
    }
    return ans;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:30:30: error: 'struct std::pair<int, int>' has no member named 'firstr'; did you mean 'first'?
   30 |         sum -= a[dq.front()].firstr;
      |                              ^~~~~~
      |                              first