Submission #297194

#	Time	Username	Problem	Language	Result	Execution time	Memory
297194		jeroenodb	Detecting Molecules (IOI16_molecules)	C++14	19 / 100	1 ms	416 KiB

molecules

#include "molecules.h"
#include <algorithm>
using namespace std;

struct we{
    int w, id;
    bool operator<(const we& o) {
        return w<o.w;
    }
};

std::vector<int> find_subset(int l, int u, std::vector<int> w) {
    int n = w.size();
    vector<we> mw;
    mw.reserve(n); for(int i=0;i<n;++i)  mw.push_back({w[i],i});
    sort(mw.begin(),mw.end());
    
    long long sum=0;
    int i;
    for(i=0;i<n;++i) {
        sum+=mw[i].w;
        if(sum>=l) break;
    }
    if(sum<l) return vector<int>(0);
    if(sum>=l and sum<=u) {
        vector<int> ans;
        for(int k=0;k<=i;++k) {
            ans.push_back(mw[k].id);
        }
        return ans;
    }
    sum-=mw[i].w;
    
    for(int j=0;n-1-j>=i;++j) {
        sum-=mw[j].w;
        sum+=mw[n-1-j].w;
        if(sum>=l and sum <=u) {
            vector<int> ans;
            for(int k=j+1;k<i;++k) {
                ans.push_back(mw[k].id);
            }
            for(int k=n-j-1;k<n;++k) {
                ans.push_back(mw[k].id);
            }
            return ans;
        }
    }
    return vector<int>(0);

}

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