Submission #525988

#	Time	Username	Problem	Language	Result	Execution time	Memory
525988		gs21045	Detecting Molecules (IOI16_molecules)	C++14	0 / 100	0 ms	216 KiB

molecules

#include <bits/stdc++.h>
#include "molecules.h"
#define endl '\n'
#define F first
#define S second
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
vector<int> find_subset(int l,int u,vector<int> a)
{
    vector<int> result;
    int n=a.size();
    vector<pll> w(n+1); for(int i=1; i<=n; i++) w[i].F=(ll)a[i-1],w[i].S=i;
    sort(w.begin()+1,w.end());
    vector<ll> sum(n+1);
    for(int i=1; i<w.size(); i++) sum[i]=sum[i-1]+w[i].F;
    int st=n,en=n;
    while(st>0 && sum[en]-sum[st-1]<(ll)l) st--;
    if(sum[en]-sum[st-1]<(ll)l) return result;
    while(en>0 && sum[en]-sum[st-1]>(ll)u)
    {
        en--;
        while(st>0 && sum[en]-sum[st-1]<(ll)l) st--;
    }
    if(sum[en]-sum[st-1]<=(ll)u && sum[en]-sum[st-1]>=(ll)l)
        for(int i=st; i<=en; i++)
            result.push_back(w[i].S);
    return result;
}
/*
int main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    int n,l,u;
    cin>>n>>l>>u;
    vector<int> w(n);
    for(int i=0; i<n; i++) cin>>w[i];
    vector<int> result=find_subset(l,u,w);
    cout<<(int)result.size()<<endl;
    for(int i=0; i<(int)result.size(); i++) cout<<result[i]<<' ';
    return 0;
}
*/

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:16:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(int i=1; i<w.size(); i++) sum[i]=sum[i-1]+w[i].F;
      |                  ~^~~~~~~~~

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