Submission #73472

#	Time	Username	Problem	Language	Result	Execution time	Memory
73472		jiaqing23	Toys (CEOI18_toy)	C++14	79 / 100	5026 ms	3708 KiB

toy

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

#define fi first
#define se second
#define mp make_pair
#define pb push_back
#define pop pop_back
#define fbo find_by_order
#define ook order_of_key

typedef long long ll;
typedef pair<ll,ll> pi;
typedef vector<ll> vi;
typedef long double ld;
typedef tree<ll, null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> pbds;
typedef set<ll>::iterator sit;
typedef map<ll,ll>::iterator mit;
typedef pair<int,pair<int,int> > tri;

set<ll> ans;
ll n;
vector<ll> fac;
vector<ll> factor_tem, factor;
ll sum = 0;
ll k;
ll smallfac=1;

void factorize(ll now){
    if(now == n) ans.insert(sum-fac.size());

    for(int i = smallfac;  now*factor[i]  <= n ; i++){
        ll k = now*factor[i];
        if(n%k == 0){
            fac.pb(factor[i]);
            sum+=(factor[i]);
            smallfac  = i;
            factorize(k);
            sum-=(factor[i]);
            fac.pop();
        }
    }
}

int main()
{
    scanf("%lld",&n);

    for(int i = 1; i * i <= n; i++){
        if(n%i==0) {
            factor.pb(i);
            if(i*i!=n)factor_tem.pb(n/i);
        }
    }
    reverse(factor_tem.begin(),factor_tem.end());
    factor_tem.pb((ll)1e10);
    factor.resize(factor_tem.size()+factor.size());

    copy_backward(factor_tem.begin(),factor_tem.end(),factor.end());

    factorize(1);

    printf("%d\n",ans.size());

    for(set<ll>::iterator it = ans.begin(); it!=ans.end(); it++){
        printf("%lld ",*it);
    }
	return 0;
}

Compilation message (stderr)

toy.cpp: In function 'int main()':
toy.cpp:67:29: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::set<long long int>::size_type {aka long unsigned int}' [-Wformat=]
     printf("%d\n",ans.size());
                   ~~~~~~~~~~^
toy.cpp:51:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&n);
     ~~~~~^~~~~~~~~~~

• Subtask 1: 19 / 19
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 0 / 21