Submission #537183

#	Time	Username	Problem	Language	Result	Execution time	Memory
537183		andrei_boaca	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	50 ms	6784 KiB

molecules

#include <bits/stdc++.h>
#include "molecules.h"
//#include "grader.cpp"
using namespace std;
typedef long long ll;
int n;
struct date
{
    ll val,poz;
} v[200005];
ll s[200005];
bool comp(date a, date b)
{
    return a.val<b.val;
}
vector<int> find_subset(int l,int u,vector<int> w)
{
    n=w.size();
    for(int i=0;i<w.size();i++)
        if(w[i]>=l&&w[i]<=u)
            return {i};
    for(int i=0;i<w.size();i++)
        v[i+1]={w[i],i};
    sort(v+1,v+n+1,comp);
    for(int i=1;i<=n;i++)
        s[i]=s[i-1]+v[i].val;
    for(int i=1;i<=n;i++)
    {
        ll pozmin=1e9;
        ll st=i;
        ll dr=n;
        while(st<=dr)
        {
            ll mij=(st+dr)/2;
            ll suma=s[mij]-s[i-1];
            if(suma>=l)
            {
                pozmin=mij;
                dr=mij-1;
            }
            else
                st=mij+1;
        }
        if(pozmin>n)
            continue;
        ll suma=s[pozmin]-s[i-1];
        if(suma<=u)
        {
            vector<int> vals;
            for(int j=i;j<=pozmin;j++)
                vals.push_back(v[j].poz);
            return vals;
        }
    }
    return {};
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:19:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     for(int i=0;i<w.size();i++)
      |                 ~^~~~~~~~~
molecules.cpp:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for(int i=0;i<w.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