Submission #642552

#	Time	Username	Problem	Language	Result	Execution time	Memory
642552		rc_catunta	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	58 ms	10764 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll,int> ii;

vector<int> find_subset(int l, int u, vector<int> w) {
    vector<ii> v;
    for(int i=0;i<w.size();i++){
        v.push_back(ii(ll(w[i]),i));
    }
    sort(v.begin(),v.end());
    // Acumuladas
    vector<ll>a;
    a.push_back(v[0].first);
    for(int i=1;i<v.size();i++){
        a.push_back(a[i-1]+v[i].first);
    }  
    vector<int> res;
    long long objetivo;
    int pos;
    for(int i=0;i<a.size();i++){
        if(a[i]>=l and a[i]<=u){
            // Es el rango de 0 hasta i
            for(int k=0;k<=i;k++)
                res.push_back(v[k].second);
            return res;
        }
        // Busqueda Binaria
        objetivo = l+a[i];
        int pos = lower_bound(a.begin(),a.end(),objetivo)-a.begin();
        //cout<<a[i]<<" buscando a "<<objetivo<<"\n";
        //cout<<"Pos encontrada "<<pos<<"\n";
        long long suma = a[pos]-a[i];
        if(suma>=l and suma<=u){
            for(int k=i+1;k<=pos;k++)
                res.push_back(v[k].second);
            return res;
        }
    }
    res.clear();
    return res;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:11:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for(int i=0;i<w.size();i++){
      |                 ~^~~~~~~~~
molecules.cpp:18:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     for(int i=1;i<v.size();i++){
      |                 ~^~~~~~~~~
molecules.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i=0;i<a.size();i++){
      |                 ~^~~~~~~~~
molecules.cpp:23:9: warning: unused variable 'pos' [-Wunused-variable]
   23 |     int pos;
      |         ^~~

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