Submission #584618

#	Time	Username	Problem	Language	Result	Execution time	Memory
584618		Newtech66	Detecting Molecules (IOI16_molecules)	C++17	Compilation error	0 ms	0 KiB

molecules

#include<bits/stdc++.h>
using namespace std;
using lol=long long int;
#define endl "\n"
const lol mod1=1e9+7,mod2=998244353,mod3=1000000000000000003;
const lol inf=1e18+8;
const double eps=1e-12;
const double PI=acos(-1.0);
const int N=3e5+5;
#include <ext/pb_ds/assoc_container.hpp> // Common file
#include <ext/pb_ds/tree_policy.hpp> // Including tree_order_statistics_node_update
using namespace __gnu_pbds;
typedef tree<pair<int,int>,null_type,less<pair<int,int> >,rb_tree_tag,tree_order_statistics_node_update> ordered_set;
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

vector<int> find_subset(int l,int u,vector<int> w)
{
    int n=(int)w.size();
    vector<int> ans;
    lol S=0;
    vector<pair<int,int>> v(n);
    for(int i=0;i<n;i++)    v[i]={w[i],i};
    sort(v.begin(),v.end());
    bool found=false;
    for(int i=n-1;i>=0;i--)
    {
        if(l<=S && S<=u)
        {
            found=true;
            break;
        }
        if(S<l && S+v[i].first>u)   break;
        ans.push_back(v[i].second);
        S+=v[i].first;
    }
    if(found)   return ans;
    if(ans.size()==n)
    {
        ans.clear();
        return ans;
    }
    S+=v[0].first;
    ans.push_back(v[0].second);
    if(l<=S && S<=u)    return ans;
    else
    {
        ans.clear();
        return ans;
    }
}

int main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int _=1;
//cin>>_;
while(_--)
{
    int n,l,u;
    cin>>n>>l>>u;
    vector<int> w(n);
    for(auto& e:w)  cin>>e;
    vector<int> ans=find_subset(l,u,w);
    for(auto e:ans) cout<<e<<" ";
}
return 0;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:37:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   37 |     if(ans.size()==n)
      |        ~~~~~~~~~~^~~
/usr/bin/ld: /tmp/cc5a8Ukg.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccziau3f.o:molecules.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status