Submission #380156

#	Time	Username	Problem	Language	Result	Execution time	Memory
380156		vishesh312	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	58 ms	8284 KiB

molecules

#include"molecules.h"
#include"bits/stdc++.h"
using namespace std;
using ll = long long;

vector<int> find_subset(int l, int u, vector<int> w) {
    vector<pair<ll, int>> v;
    for (int i = 0; i < (int)w.size(); ++i) {
        v.push_back({w[i], i});
    }
    int n = w.size();
    sort(v.begin(), v.end());
    ll sum = 0;
    vector<int> pre, suf;
    for (int i = 0; i < n; ++i) {
        if (sum + v[i].first > u) {
            break;
        }
        sum += v[i].first;
        pre.push_back(v[i].second);
    }
    if (sum >= l) {
        return pre;
    }
    for (int i = n-1; i >= 0; --i) {
        if (pre.size() + suf.size() == n or pre.size() == suf.size()) {
            break;
        }
        suf.push_back(v[i].second);
    }
    deque<int> dq(pre.begin(), pre.end());
    for (int i = 0; i < (int)suf.size(); ++i) {
        sum -= w[pre[i]];
        sum += w[suf[i]];
        dq.pop_front();
        dq.push_back(suf[i]);
        if (sum >= l and sum <= u) {
            vector<int> ret(dq.begin(), dq.end());
            return ret;
        }
    }
    vector<int> ret;
    return ret;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:26:37: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   26 |         if (pre.size() + suf.size() == n or pre.size() == suf.size()) {
      |             ~~~~~~~~~~~~~~~~~~~~~~~~^~~~

• Subtask 1: 9 / 9
• Subtask 2: 10 / 10
• Subtask 3: 12 / 12
• Subtask 4: 15 / 15
• Subtask 5: 23 / 23
• Subtask 6: 31 / 31