Submission #719979

#	Time	Username	Problem	Language	Result	Execution time	Memory
719979		vinnipuh01	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
#define int long long

using namespace std;

vector <int> v;

vector<int> find_subset(int l , int u , vector<int> w) {
	set <pair<int, int> > st, s;
	int sum = 0;
	vector <pair<int, int> > ww;
	for ( int i = 0; i < w.size(); i ++ )
		ww.push_back( { w[  i], i } );
	sort( ww.begin(), ww.end() );
	if ( ww.front().first > u ) {
		vector <int> v;
		return v;
	}
	else if ( ww.front().first <= u && ww.front().first >= l ) {
		vector <int> v;
		v.push_back( ww.front().second );
		return v;
	}
	for ( int i = 0; i < ww.size(); i ++ ) {
		if ( sum + ww[ i ].first <= u )
			st.insert( { ww[ i ].first, ww[ i ].second } ), sum += ww[ i ].first;
		else
			s.insert( { ww[ i ].first, ww[ i ].second } );
	}
	while ( sum < l ) {
		if ( !s.size() )
			break;
		sum += s.rbegin()->first - st.begin()->first;
		st.erase( st.begin() );
		st.insert( *s.rbegin() );
		s.erase( --s.end() );
	}
	vector <int> v;
	v.clear();
	if ( sum < l )
		return v;
	for ( auto i : st )
		v.push_back( i.second );
	sort( v.begin(), v.end() );
    return v;
}

//main () {
//	int l, r;
//	cin >> l >> r;
//	int n;
//	cin >> n;
//	int num;
//	for ( int i = 1; i <= n; i ++ ) {
//		cin >> num;
//		v.push_back( num );
//	}
//	v = find_subset( l, r, v );
//	if ( v.size() )
//		cout << "YES\n";
//	else
//		cout << "NO\n";
//}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<long long int> find_subset(long long int, long long int, std::vector<long long int>)':
molecules.cpp:13:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |  for ( int i = 0; i < w.size(); i ++ )
      |                   ~~^~~~~~~~~~
molecules.cpp:25:21: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  for ( int i = 0; i < ww.size(); i ++ ) {
      |                   ~~^~~~~~~~~~~
/usr/bin/ld: /tmp/ccN5kPnG.o: in function `main':
grader.cpp:(.text.startup+0x18d): undefined reference to `find_subset(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status