Submission #432140

#	Time	Username	Problem	Language	Result	Execution time	Memory
432140		Monchito	Detecting Molecules (IOI16_molecules)	C++14	19 / 100	1 ms	296 KiB

molecules

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

vector<int> find_subset(int l, int u, vector<int> w) {
    vector<int> ret;
    bool can=false;
    int n = (int)w.size();

    vector<pair<int,int>> W(n);

    for(int i=0; i<n; i++) W[i] = make_pair(w[i], i);

    sort(W.begin(), W.end());
    
    pair<int,int> w1 = make_pair(W[0].first, 1);
    pair<int,int> w2 = make_pair(-1, 0);

    for(int i=1; i<n; i++) {
        if(w2 == make_pair(-1, 0)) {
            if(W[i].first == W[i-1].first) w1.second++;
            else w2 = make_pair(W[i].first, 1);
        }
        else w2.second++;
    }

    pair<int,int> p;

    for(int i=0; i<=w1.second; i++) {
        for(int j=0; j<=w2.second; j++) {
            int v = w1.first * i + w2.first * j; 
            if(v >= l && v <= u) {
                can = true;
                p = make_pair(i, j);
                break;
            }
        }

        if(can) break;
    }

    if(can) {
        for(int i=0; i<n; i++) {
            if(p.first == -1 && p.second == 0) break;

            if(p.first == -1) {
                p.second--;
                ret.push_back(W[i].second);
                continue;
            }
            
            if(p.first > 0) { p.first--; ret.push_back(W[i].second); }
            if(p.first == 0 && i<n-1 && W[i+1].first != W[i].first) p.first--;
        }
    }

    return (can)? ret : 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