Submission #1001744

#	Time	Username	Problem	Language	Result	Execution time	Memory
1001744		vjudge1	Detecting Molecules (IOI16_molecules)	C++17	46 / 100	2 ms	784 KiB

molecules

#include "molecules.h"
#include<bits/stdc++.h>
#pragma GCC optimize("-O3")
#define ll int
#define ld long double
#define vl vector<ll>
#define vi vector<int>
#define pii pair<int, int>
#define pll pair<ll, ll>
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define f first
#define s second
#define pb push_back
#define p_b pop_back
using namespace std;
vl find_subset(ll l, ll u, vl w) {
    vl ans;
    ll cnt = 0, sum = 0;
    for(int i = 0; i < w.size(); i++)
    {
        if(w[i] > u)
            cnt++;
        sum += w[i];
        if(l <= w[i] && w[i] <= u)
        {
            ans.pb(i);
            return ans;
        }
    }
    if(cnt == (ll)w.size() || sum < l)
        return ans;
    vector<pll>vect;
    for(ll i = 0; i < w.size(); i++)
        vect.pb({w[i], i});
    sort(all(vect));
    ll tl = 0, tr = 0;
    sum = 0;
    while(tl < vect.size())
    {
        while(tr < vect.size() && sum + vect[tr].f <= u)
        {
            sum += vect[tr].f;
            tr++;
        }
        if(l <= sum && sum <= u)
        {
            for(ll j = tl; j < tr; j++)
                ans.pb(vect[j].s);
            return ans;
        }
        sum -= vect[tl].f;
        tl++;
    }
    return ans;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:20:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for(int i = 0; i < w.size(); i++)
      |                    ~~^~~~~~~~~~
molecules.cpp:34:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     for(ll i = 0; i < w.size(); i++)
      |                   ~~^~~~~~~~~~
molecules.cpp:39:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     while(tl < vect.size())
      |           ~~~^~~~~~~~~~~~~
molecules.cpp:41:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |         while(tr < vect.size() && sum + vect[tr].f <= u)
      |               ~~~^~~~~~~~~~~~~

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