Submission #434910

#	Time	Username	Problem	Language	Result	Execution time	Memory
434910		ToroTN	Detecting Molecules (IOI16_molecules)	C++14	100 / 100	76 ms	6600 KiB

molecules

#include<bits/stdc++.h>
using namespace std;
#include "molecules.h"
long long st,md,ed;
vector<int> emptyvec;
vector<pair<long long,long long> > v;
long long query(long long l,long long r)
{
    if(l==0)
    {
        return v[r].first;
    }
    return v[r].first-v[l-1].first;
}
std::vector<int> find_subset(int l,int u, std::vector<int> w) {
    for(int i=0;i<w.size();i++)
    {
        v.push_back(make_pair(w[i],i));
    }
    sort(v.begin(),v.end());
    for(int i=1;i<v.size();i++)
    {
        v[i].first+=v[i-1].first;
    }
    /*for(int i=0;i<v.size();i++)
    {
        for(int j=i;j<v.size();j++)
        {
            printf("%d %d %lld\n",i,j,query(i,j));
        }
    }*/
    for(int i=0;i<v.size();i++)
    {
        st=i;
        ed=v.size()-1;
        //printf("%d\n",i);
        while(ed>=st)
        {
            md=(st+ed)/2;
            //printf("%lld %lld %lld\n",st,md,ed);
            if(query(i,md)>=l)
            {
                ed=md-1;
            }else
            {
                st=md+1;
            }
        }
        //printf("%lld %lld %lld\n",st,md,ed);
        if(st<v.size())
        {
            if(query(i,st)<=u)
            {
                for(int j=i;j<=st;j++)
                {
                    emptyvec.push_back(v[j].second);
                }
                return emptyvec;
            }
        }
    }
    return emptyvec;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:16:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(int i=0;i<w.size();i++)
      |                 ~^~~~~~~~~
molecules.cpp:21:18: 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]
   21 |     for(int i=1;i<v.size();i++)
      |                 ~^~~~~~~~~
molecules.cpp:32:18: 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]
   32 |     for(int i=0;i<v.size();i++)
      |                 ~^~~~~~~~~
molecules.cpp:50:14: 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]
   50 |         if(st<v.size())
      |            ~~^~~~~~~~~

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