Submission #642551

#	Time	Username	Problem	Language	Result	Execution time	Memory
642551		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;
        }
        // Two pointers
        int left=0,right=v.size()-1;
        while(left<right){
            int ps = a[right]-a[left];
            if(ps<=u and ps>=l){
                for(int k=left+1;k<=right;k++)
                    res.push_back(v[k].second);
                return res;
            }
            if(ps>u) right--;
            if(ps<l) left++;
        }
    }
    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:22:15: warning: unused variable 'objetivo' [-Wunused-variable]
   22 |     long long objetivo;
      |               ^~~~~~~~
molecules.cpp:23:9: warning: unused variable 'pos' [-Wunused-variable]
   23 |     int pos;
      |         ^~~

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