Submission #344238

#	Time	Username	Problem	Language	Result	Execution time	Memory
344238		Enkhmunkh	Bootfall (IZhO17_bootfall)	C++14	13 / 100	1082 ms	492 KiB

bootfall

#include <bits/stdc++.h>
using namespace std;
bool check(int sum, vector<int>v, int n) {
    if(sum % 2) {
        return 0;
    }
    sum /= 2;
    vector<bool> dp(sum + 1, 0);
    dp[0] = 1;
    for(int i = 0; i < n; i++) {
        for(int j = sum; j >= v[i]; j--) {
            if(dp[j - v[i]]) dp[j] = 1;
        }
    }
    if (dp[sum]) {
        return 1;
    }else {
        return 0;
    }
}
int main () {
    int n;
    cin >> n;
    vector<int> arr;
    int sum = 0;
    int tmp;
    for (int i = 0; i < n; i++) {
        cin >> tmp;
        arr.push_back(tmp);
        sum+=tmp;
    }
    vector<int> val;
    for (int i = 1; i <= sum; i++) {
        vector<int> cp;
        sum+=i;
        for (int j = 0; j < n; j++) {
            cp.push_back(arr[j]);
        }
        cp.push_back(i);
        int b = 0;
        for (int j = 0; j < n+1; j++) {
            int tmp = cp[j];
            sum-=tmp;
            cp.erase(cp.begin()+j);
            if (check(sum, cp, n)) {
                b++;
            }
            cp.insert(cp.begin() + j, tmp);
            sum+=tmp;
        }
        if (b == n+1) {
            val.push_back(i);
        }
        cp.pop_back();
        sum-=i;
    }
    cout << val.size() << "\n";
    for (int i = 0; i < val.size(); i++) {
        cout << val[i] << " ";
    }
    cout << "\n";
}

Compilation message (stderr)

bootfall.cpp: In function 'int main()':
bootfall.cpp:58:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |     for (int i = 0; i < val.size(); i++) {
      |                     ~~^~~~~~~~~~~~

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