Submission #1007876

#	Time	Username	Problem	Language	Result	Execution time	Memory
1007876		canonica1	Toys (CEOI18_toy)	C++17	100 / 100	4966 ms	87688 KiB

toy

#include <algorithm>
#include <iostream>
#include <vector>
#include <set>
using namespace std;
vector<int> ans;
vector<int> factors;
vector<vector<int>> g;
vector<set<int>> M;
void rec(int n, int answer) {
    if(M[n].count(answer)) return;
    M[n].insert(answer);
    if (factors[n] == 1) {
        ans.push_back(answer);
        return;
    }
    for(auto d : g[n]) {
        rec(d, answer + factors[n] / factors[d] - 1);
    }
}
int main() {
    int n;
    cin >> n;
    for (int i = 1; i * i <= n; i++) {
        if (n % i == 0) {
            factors.push_back(i);
            if (i * i != n) {
                factors.push_back(n / i);
            }
        }
    }
    sort(factors.begin(), factors.end());
    g.resize(factors.size());
    M.resize(factors.size());
    for(int i = 0; i < factors.size(); i++){
        for(int j = i + 1; j < factors.size(); j++){
            if(factors[j] % factors[i] == 0){
                g[j].push_back(i);
            }
        }
    }
    rec(factors.size() - 1, 0);
    sort(ans.begin(), ans.end());
    cout << ans.size() << endl;
    for (auto x : ans) {
        cout << x << " ";
    }
}

Compilation message (stderr)

toy.cpp: In function 'int main()':
toy.cpp:35:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |     for(int i = 0; i < factors.size(); i++){
      |                    ~~^~~~~~~~~~~~~~~~
toy.cpp:36:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |         for(int j = i + 1; j < factors.size(); j++){
      |                            ~~^~~~~~~~~~~~~~~~

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