Submission #458221

#	Time	Username	Problem	Language	Result	Execution time	Memory
458221		cpp219	Toys (CEOI18_toy)	C++17	100 / 100	844 ms	4444 KiB

toy

#pragma GCC optimization O2
#pragma GCC optimization "unroll-loop"
#pragma target ("avx2")

#include <bits/stdc++.h>
#define ll int
#define ld long double
#define fs first
#define sc second
using namespace std;
typedef pair<ll,ll> LL;
const ll N = 1e5 + 9;
const ll Log2 = 21;
const ll inf = 1e9 + 7;

set<ll> s;
vector<ll> uoc;
ll n;

void f(int n, int stop, int sum) {
	s.insert(sum + n - 1);
	for (int i = stop; i <= n/i; ++i)
		if (n % i == 0)
			f(n/i, i, sum + i - 1);
}

int main(){
    ios_base::sync_with_stdio(NULL); cin.tie(0); cout.tie(0);
    #define task "tst"
    if (fopen(task".INP","r")){
        freopen(task".INP","r",stdin);
        //freopen(task".OUT","w",stdout);
    }
    cin>>n; uoc.push_back(n);
    for (ll i = 2;i <= n/i;i++){
        if (n%i == 0){
            uoc.push_back(i);
            if (n/i != i) uoc.push_back(n/i);
        }
    }
    sort(uoc.begin(),uoc.end()); f(n,2,0);
    cout<<s.size()<<"\n";
    for (auto i : s) cout<<i<< " ";
}

Compilation message (stderr)

toy.cpp:1: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    1 | #pragma GCC optimization O2
      | 
toy.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization "unroll-loop"
      | 
toy.cpp:3: warning: ignoring '#pragma target ' [-Wunknown-pragmas]
    3 | #pragma target ("avx2")
      | 
toy.cpp: In function 'int main()':
toy.cpp:31:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         freopen(task".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

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