Submission #719959

#	Time	Username	Problem	Language	Result	Execution time	Memory
719959		vinnipuh01	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

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

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;
	sort( w.begin(), w.end() );
	if ( w.front() > u ) {
		vector <int> v;
		return v;
	}
	else if ( w.front() <= u && w.front() >= l ) {
		vector <int> v;
		v.push_back( 0 );
		return v;
	}
	for ( int i = 0; i < w.size(); i ++ ) {
		if ( sum + w[ i ] <= l )
			st.insert( { w[ i ], i } ), sum += w[ i ];
		else
			s.insert( { w[i ], i } );
	}
	while ( s.size() && sum < l ) {
		if ( st.size() )
			sum += s.rbegin()->first - st.begin()->first;
		else
			sum += s.rbegin()->first;
		if ( st.size() )
			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 );
    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 );
	for ( auto i : v )
		cout << i << " ";
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:21:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |  for ( int i = 0; i < w.size(); i ++ ) {
      |                   ~~^~~~~~~~~~
molecules.cpp: At global scope:
molecules.cpp:46:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   46 | main () {
      | ^~~~
/usr/bin/ld: /tmp/ccx7PfcP.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccVpxLBR.o:molecules.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status