Submission #70205

#	Time	Username	Problem	Language	Result	Execution time	Memory
70205		Vahan	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	107 ms	8828 KiB

molecules

#include "molecules.h"
#include<algorithm>
#include<vector>
using namespace std;
long long s[300000];
vector<int> g;
vector<pair<int,int> > v;
int x,y,e=-1,f;
void bin(int l,int r,int a)
{
    if(l>r)
        return;
    if(l==r)
    {
        if(s[a]-s[l]>=x && s[a]-s[l]<=y)
        {
            e=l;
            f=a-1;
        }
        return;
    }
    int mid=(l+r)/2;
    if(s[a]-s[mid]<x)
        bin(0,mid-1,a);
    else if(s[a]-s[mid]>y)
        bin(mid+1,r,a);
    else
    {
        e=mid;
        f=a-1;
        return;
    }
}
std::vector<int> find_subset(int l, int u, std::vector<int> w) {
    x=l;
    y=u;
    for(int i=0;i<w.size();i++)
        v.push_back({w[i],i});
    sort(v.begin(),v.end());
    for(int i=1;i<=v.size();i++)
        s[i]=s[i-1]+v[i-1].first;
    for(int i=v.size();i>=1;i--)
    {
        bin(0,i-1,i);
        if(e!=-1)
            break;
    }
    if(e==-1)
        return std::vector<int>(0);
    for(int i=e;i<=f;i++)
        g.push_back(v[i].second);
    return g;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<w.size();i++)
                 ~^~~~~~~~~
molecules.cpp:40:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=1;i<=v.size();i++)
                 ~^~~~~~~~~~

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