Submission #289378

#	Time	Username	Problem	Language	Result	Execution time	Memory
289378		UserIsUndefined	Detecting Molecules (IOI16_molecules)	C++14	100 / 100	70 ms	12032 KiB

molecules

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

using namespace std;

std::vector<int> find_subset(int l, int u, std::vector<int> w) {
    vector<pair<long long,int>> small,big, W;


    for (int i = 0 ; i < w.size() ; i++){
        W.push_back({w[i] , i});
    }

    sort(W.begin(), W.end());

    long long sum = 0;
    bool good = 0;

    for (int i = 0 ; i < W.size() ; i++){
        sum+= W[i].first;
        small.push_back(W[i]);
        if (sum >= l && sum <= u){
            vector<int> re;
            for (int i = 0 ; i < small.size() ; i++){
                re.push_back(small[i].second);
            }
            return re;
        }
        if (sum > u){
            good = 1;
            small.pop_back();
            sum-= W[i].first;
            break;
        }
    }

    if (good == 0){
        vector<int> em;
        return em;
    }

//    cout << sum << endl;

    long long sum2 = 0;


    for (int i = 0 ; i < small.size() ; i++){
        sum2+= W[W.size() - 1 - i].first;
        big.push_back(W[W.size() - 1 - i]);
    }


    if (sum2 < l){
        return {};
    }

    for (int i = 0 ; i < small.size() ; i++){
        sum-= small[i].first;
        sum+= big[i].first;
        swap(small[i], big[i]);
        if (sum >= l && sum <= u){
            vector<int> re;
            for (int i = 0 ; i < small.size() ; i++){
                re.push_back(small[i].second);
            }
            return re;
        }
    }


}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:10:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     for (int i = 0 ; i < w.size() ; i++){
      |                      ~~^~~~~~~~~~
molecules.cpp:19:24: 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]
   19 |     for (int i = 0 ; i < W.size() ; i++){
      |                      ~~^~~~~~~~~~
molecules.cpp:24:32: 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]
   24 |             for (int i = 0 ; i < small.size() ; i++){
      |                              ~~^~~~~~~~~~~~~~
molecules.cpp:47:24: 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]
   47 |     for (int i = 0 ; i < small.size() ; i++){
      |                      ~~^~~~~~~~~~~~~~
molecules.cpp:57:24: 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]
   57 |     for (int i = 0 ; i < small.size() ; i++){
      |                      ~~^~~~~~~~~~~~~~
molecules.cpp:63:32: 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]
   63 |             for (int i = 0 ; i < small.size() ; i++){
      |                              ~~^~~~~~~~~~~~~~
molecules.cpp:7:33: warning: control reaches end of non-void function [-Wreturn-type]
    7 |     vector<pair<long long,int>> small,big, W;
      |                                 ^~~~~

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