제출 #153694

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
153694		Ruxandra985	Toys (CEOI18_toy)	C++14	100 / 100	590 ms	4608 KiB

toy

#include <cstdio>
#include <set>
#include <algorithm>

using namespace std;
set <int> st;
int v[50000],elem;
void back (int n , int sum , int prev){
    int d;
    if (n == 1){
        st.insert(sum);
    }
    else {
        for (int i = prev; i<= elem && v[i] * v[i] <= n ; i++){
            if (n%v[i] == 0)
                back (n/v[i],sum + v[i] - 1,i);
        }
        back(1 , sum + n - 1, n);
    }
}
int main()
{
    FILE *fin = stdin;
    FILE *fout = stdout;
    int n,d;
    fscanf (fin,"%d",&n);
    d = 2;
    elem = 0;
    while (d*d<=n){
        if (n%d == 0)
            v[++elem] = d;
        d++;
    }
    /// trb sa generez cumva toate seturile de divizori
    back (n , 0 , 1);
    fprintf (fout,"%d\n",st.size());
    for (set <int> :: iterator it = st.begin() ; it!=st.end() ; it++){
        fprintf (fout,"%d ",*it);
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

toy.cpp: In function 'void back(int, int, int)':
toy.cpp:9:9: warning: unused variable 'd' [-Wunused-variable]
     int d;
         ^
toy.cpp: In function 'int main()':
toy.cpp:36:35: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::set<int>::size_type {aka long unsigned int}' [-Wformat=]
     fprintf (fout,"%d\n",st.size());
                          ~~~~~~~~~^
toy.cpp:26:12: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     fscanf (fin,"%d",&n);
     ~~~~~~~^~~~~~~~~~~~~

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