Submission #474700

#	Time	Username	Problem	Language	Result	Execution time	Memory
474700		RafaelSus	Detecting Molecules (IOI16_molecules)	C++14	100 / 100	86 ms	6200 KiB

molecules

#include <iostream>
#include <vector>
#include <algorithm>
std::vector<int> find_subset(int l, int r, std::vector<int> a){
    std::vector<std::pair<int, int>> aa;
    for(int i = 0; i < a.size(); i++){
        aa.push_back({a[i], i});
    }
    std::sort(aa.begin(), aa.end());
    std::sort(a.begin(), a.end());
    int pl = 0;
    int pr = 1;
    long long sum = a[0];
    bool ok = true;
    while(true){
        if (pl >= a.size() && pr >= a.size()){
            ok = false;
            break;
        }
        if (pl > pr){
            ok = false;
            break;
        }
        if (sum >= l && sum <= r){
            break;
        }else if (sum < l && pr < a.size()){
            pr++;
            sum += a[pr - 1];
        }else if (sum < l && pr >= a.size()) {
            ok = false;
            break;
        }else if (sum > r && pl < a.size()){
            sum -= a[pl];
            pl++;
        }else if (sum > r && pl >= a.size()){
            ok = false;
            break;
        }
    }
    if (ok) {
        std::vector<int> answ;
        for (int i = pl; i < pr; i++)
            answ.push_back(aa[i].second);
        return answ;
    }else {
        std::vector<int> answ;
        return answ;
    }
}

#ifdef TEST

int main(){
    int l, r;
    unsigned int n;
    std::cin >> l >> r >> n;
    std::vector<int> a(n);
    for (int i = 0; i < n; i++)
        std::cin >> a[i];
    std::vector<int> answ = find_subset(l, r, a);
    for (int i = 0; i < answ.size(); i++){
        std::cout << answ[i] << ' ';
    }
    std::cout << '\n';
}

#endif

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:6:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |     for(int i = 0; i < a.size(); i++){
      |                    ~~^~~~~~~~~~
molecules.cpp:16:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         if (pl >= a.size() && pr >= a.size()){
      |             ~~~^~~~~~~~~~~
molecules.cpp:16:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         if (pl >= a.size() && pr >= a.size()){
      |                               ~~~^~~~~~~~~~~
molecules.cpp:26:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |         }else if (sum < l && pr < a.size()){
      |                              ~~~^~~~~~~~~~
molecules.cpp:29:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         }else if (sum < l && pr >= a.size()) {
      |                              ~~~^~~~~~~~~~~
molecules.cpp:32:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |         }else if (sum > r && pl < a.size()){
      |                              ~~~^~~~~~~~~~
molecules.cpp:35:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         }else if (sum > r && pl >= a.size()){
      |                              ~~~^~~~~~~~~~~

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