Submission #877284

#	Time	Username	Problem	Language	Result	Execution time	Memory
877284		AI_2512	Bootfall (IZhO17_bootfall)	C++14	0 / 100	1 ms	604 KiB

bootfall

#include <iostream>
#include <vector>
#include <numeric>
using namespace std;

bool splitArrayHelper(const vector<int>& nums, int index, int sum1, int sum2, vector<int>& arr1, vector<int>& arr2) {
    if (index == nums.size()) {
        return sum1 == sum2;
    }

    arr1.push_back(nums[index]);
    if (splitArrayHelper(nums, index + 1, sum1 + nums[index], sum2, arr1, arr2)) {
        return true;
    }
    arr1.pop_back();

    arr2.push_back(nums[index]);
    if (splitArrayHelper(nums, index + 1, sum1, sum2 + nums[index], arr1, arr2)) {
        return true;
    }
    arr2.pop_back(); 

    return false;
}

bool splitArray(const vector<int>& nums, vector<int>& arr1, vector<int>& arr2) {
    int sum1 = 0, sum2 = 0;
    return splitArrayHelper(nums, 0, sum1, sum2, arr1, arr2);
}

int main() 
{
    int n;
    cin >> n;
    vector<int> arr;
    vector<int> arr2,arr3;
    vector<int> res;
    for (int i = 0; i < n; i++) {
      int a;
      cin >> a;
      arr.push_back(a);
    }
    int sum = accumulate(arr.begin(), arr.end(), 0);
    bool ruined = false;
    for (int i = 1; i<=sum; i++){
        ruined = false;
        if (arr.size() > n){
            arr.erase(arr.end());
            }
        arr.push_back(i);
            for (int k = 0; k<=n; k++){
                vector<int> darr = arr;
                darr.erase(darr.begin()+k);
                if (splitArray(darr, arr2, arr3) == false){
                    ruined = true;
                    break;
                }
                arr2.clear();
                arr3.clear();
        }
        if (ruined == false){
            res.push_back(i);
        }
    }
    
    cout << res.size()<<endl;
    if (res.size()>0){
        for (const auto& element : res){
            cout << element << " ";
        }
    }
    return 0;
}

Compilation message (stderr)

bootfall.cpp: In function 'bool splitArrayHelper(const std::vector<int>&, int, int, int, std::vector<int>&, std::vector<int>&)':
bootfall.cpp:7:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    7 |     if (index == nums.size()) {
      |         ~~~~~~^~~~~~~~~~~~~~
bootfall.cpp: In function 'int main()':
bootfall.cpp:47:24: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   47 |         if (arr.size() > n){
      |             ~~~~~~~~~~~^~~

• Subtask 1: 0 / 6
• Subtask 2: 0 / 7
• Subtask 3: 0 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 21
• Subtask 6: 0 / 35