Codeforces Round #292 (Div. 2) C. Drazil and Factorial 515C
Drazil is playing a math game with Varda.
Let's define for positive integer x as a product of factorials of its digits. For example, .
First, they choose a decimal number a consisting of n digits that contains at least one digit larger than 1. This number may possibly start with leading zeroes. Then they should find maximum positive number x satisfying following two conditions:
1. x doesn't contain neither digit 0 nor digit 1.
2. = .
Help friends find such number.
The first line contains an integer n (1 ≤ n ≤ 15) — the number of digits in a.
The second line contains n digits of a. There is at least one digit in a that is larger than 1. Number a may possibly contain leading zeroes.
Output a maximum possible integer satisfying the conditions above. There should be no zeroes and ones in this number decimal representation.
4
1234
33222
3
555
555
In the first case,
题意 给出数x,得出x各位数阶乘的乘积;求得出的各位数乘积和与x得出的各位数阶乘的乘积相等的最大数
先打表ch[i] F[i]=F[p]最大值p,排序,反转
#include<iostream> #include<cstdio> #include<cstring> #include<algorithm> using namespace std; int main(){ int n; scanf("%d",&n); string str; cin>>str; string str1 = ""; string ch[10]={"","","2","3","223","5","53","7","7222","7332"}; for(int i = 0; i < n; i++){ str1 += ch[str[i]-'0']; } sort(str1.begin(),str1.end()); reverse(str1.begin(),str1.end()); cout<<str1<<endl; return 0; }