Submission #1167352

#	Time	Username	Problem	Language	Result	Execution time	Memory
1167352		SmuggingSpun	Toys (CEOI18_toy)	C++20	100 / 100	1951 ms	123224 KiB

toy

#include<bits/stdc++.h>
#define taskname "B"
using namespace std;
const int lim = 1e9 + 5;
int n, current = 0;
vector<int>d;
bitset<lim>ans;
void play(int N, int pre){
    if(N == 1){
        ans.set(current);
        return;
    }
    for(int i = pre; i < d.size() && d[i] <= N; i++){
        if(N % d[i] == 0){
            current += d[i] - 1;
            play(N / d[i], i);
            current -= d[i] - 1;
        }
    }
}
int main(){
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
        freopen(taskname".inp", "r", stdin);
	}
    cin >> n;
    for(int i = 2; i * i <= n; i++){
        if(n % i == 0){
            d.emplace_back(i);
            if(i * i != n){
                d.emplace_back(n / i);
            }
        }
    }
    sort(d.begin(), d.end());
    d.emplace_back(n);
    ans.reset();
    play(n, 0);
    cout << ans.count() << "\n";
    for(int i = 0; i <= n; i++){
        if(ans.test(i)){
            cout << i << " ";
        }
    }
}

Compilation message (stderr)

toy.cpp: In function 'int main()':
toy.cpp:24:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   24 |         freopen(taskname".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 19 / 19
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 21 / 21