Submission #507438

#	Time	Username	Problem	Language	Result	Execution time	Memory
507438		YaserFaisal	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include <bits/stdc++.h>

using namespace std ;
#define endl "\n"
#define int long long
int MAX = 1e18 , MIN = -1e18 ;
vector < pair < int , int > > v ;
vector < int > an , ran ;
int n , l , u , dif , ans , check = 0 ;

void solve( int x , int sum , int maxi , int mini )
{
    if ( l <= sum && sum <= u )
    {
        check = 1 ;
        ran = an ;
    }
    if ( check || sum > u ) return ;
    for ( int i = x ; i < v.size() ; i++ )
    {
        if ( an.size() && (maxi-mini) > dif ) break ;
        an.push_back(v[i].second) ;
        solve(i+1,sum+v[i].first,max(maxi,v[i].first),min(mini,v[i].first)) ;
        if(check) return ;
        an.pop_back() ;
    }
}

int32_t main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin >> n >> l >> u ;
    dif = u-l ; ans = -1 ;
    for ( int i = 0 ; i < n ; i++ )
    {
        int w ; cin >> w ;
        if ( l <= w && w <= u )
        {
            ans = i ;
        }
        if ( w < l ) v.push_back({w,i}) ;
    }
    if ( ans != -1 ) { cout << 1 << endl << ans << endl ; return 0 ; }
    sort(v.begin(),v.end()) ;
    solve(0,0,MIN,MAX) ;
    cout << ran.size() << endl ;
    for ( auto x:ran ) cout << x << " " ;
    
}

Compilation message (stderr)

molecules.cpp: In function 'void solve(long long int, long long int, long long int, long long int)':
molecules.cpp:19:25: 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]
   19 |     for ( int i = x ; i < v.size() ; i++ )
      |                       ~~^~~~~~~~~~
/usr/bin/ld: /tmp/cc3ADjHx.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cchC86Yv.o:molecules.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/cc3ADjHx.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