Submission #145646

#	Time	Username	Problem	Language	Result	Execution time	Memory
145646		karma	Detecting Molecules (IOI16_molecules)	C++11	0 / 100	2 ms	504 KiB

molecules

#include<bits/stdc++.h>
//#include "molecules.h"
#define ll   long long
#define mp   make_pair
#define fi   first
#define se   second

using namespace std;

typedef pair<int, int> pii;

vector<int> find_subset(int l, int u, vector<int> w)
{
    vector<pii> _w;
    vector<bool> used;
    vector<int> ans; ans.clear();
    int n, pivot = -1, s = 0;
    n = w.size(); _w.resize(n); used.resize(n);
    for(int i = 0; i < n; ++i) {
        if(w[i] >= l && w[i] <= u) {
            ans.push_back(i); return ans;
        }
        _w[i] = mp(w[i], i);
    }
    sort(_w.begin(), _w.end());
    for(int i = 0; i < n; ++i) {
        if(s + _w[i].fi <= l) s += _w[i].fi, used[_w[i].se] = 1, pivot = i;
        else break;
    }
    if(s >= l && s <= u) {
        for(int i = 0; i < n; ++i) if(used[i]) ans.push_back(i + 1);
        return ans;
    }
    for(int i = pivot + 1; i < n; ++i) {
        if(_w[i].fi > u) break;
        int upper = _w[i].fi - l + s, lower = _w[i].fi - u + s;
        int pos = lower_bound(_w.begin(), _w.begin() + pivot, mp(lower, -1)) - _w.begin();
        if(_w[pos].fi <= upper) {
            s -= _w[pos].fi; s += _w[i].fi;
            used[_w[pos].se] = 0, used[_w[i].se] = 1; break;
        }
    }
    if(s >= l && s <= u) {
        for(int i = 0; i < n; ++i) if(used[i]) ans.push_back(i + 1);
    }
    return ans;
}

/*int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if(fopen("test.inp", "r")) {
        freopen("test.inp", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    cin >> n >> l >> u;

}*/

• Subtask 1: 0 / 9
• Subtask 2: 0 / 10
• Subtask 3: 0 / 12
• Subtask 4: 0 / 15
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31