Submission #642550

#	Time	Username	Problem	Language	Result	Execution time	Memory
642550		rc_catunta	Detecting Molecules (IOI16_molecules)	C++17	9 / 100	1 ms	212 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;
        }
        int resl=-1,resu=-1;
        if(a[i]>=l){
            // Objetivo l
            objetivo = a[i] - l;
            pos = lower_bound(v.begin(),v.end(),ii(objetivo,0))-v.begin();
            if(a[i]-a[pos]>=l and a[i]-a[pos]<=u){
                resl=pos+1;
                resu=i;
            }
            if(pos>0){
                if(a[i]-a[pos-1]>=l and a[i]-a[pos-1]<=u){
                    resl=pos;
                    resu=i;
                }
            }
            if(resu>=0 and resl>=0){
                for(int k=resl;k<=resu;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:27:13: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   27 |             for(int k=0;k<=i;k++)
      |             ^~~
molecules.cpp:29:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   29 |                 return res;
      |                 ^~~~~~

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