Submission #299361

#	Time	Username	Problem	Language	Result	Execution time	Memory
299361		oscarsierra12	Detecting Molecules (IOI16_molecules)	C++14	0 / 100	1 ms	384 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std ;

vector <pair<int,int>> wr ;

std::vector<int> find_subset(int l, int u, std::vector<int> w) {
    vector <int> ans, ot ;
    if ( *min_element (w.begin(), w.end()) > u ) return std::vector<int>(0) ;
    for ( int i = 0 ; i < w.size() ; ++i ) {
        wr.push_back ( {w[i], i} ) ;
        if ( w[i] >= l && w[i] <= u ) {
            ans.push_back ( i+1 ) ;
            return ans ;
        }
    }
    long long s = 0 ;
    int sz = w.size() ;
    sort ( wr.begin(), wr.end() ) ;
    for ( int i = 0 ; i < sz ; ++i ) {
        s += wr[i].first ;
        if ( s >= l ) {
            if ( s <= u ) {
                sort ( ans.begin(), ans.end() ) ;
                return ans ;
            }
            s -= wr[i].first ;
            int s2 = 0 ;
            for ( int j = sz - 1 ; j >= sz - i ; --j ) s2 += wr[i].first ;
            if ( s2 < l ) return std::vector <int> (0) ;
            for ( int j = sz - 1 ; j >= sz - i ; --j ) {
                s -= wr[ans.back()-1].first ;
                s += wr[i].first ;
                ans.pop_back() ;
                ot.push_back (wr[j].second + 1) ;
                if ( s >= l && s <= u ) {
                    for ( auto i:ot ) ans.push_back ( i ) ;
                    sort ( ans.begin(), ans.end() ) ;
                    return ans ;
                }
            }
            break ;
        }
        ans.push_back ( wr[i].second + 1 ) ;
    }
    return std::vector <int>(0) ;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:10:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for ( int i = 0 ; i < w.size() ; ++i ) {
      |                       ~~^~~~~~~~~~

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