[5055]Bob and math problem(hdu)
2014-10-25 16:02
288 查看
Bob and math problem
Problem DescriptionThere are N Digits, each digit is between 0 and 9. You need to use this N Digits to constitute an Integer.
This Integer needs to satisfy the following conditions:
1. must be an odd Integer.
2. there is no leading zero.
3. find the biggest one which is satisfied 1, 2.
Example:
There are three Digits: 0, 1, 3. It can constitute six number of Integers. Only "301", "103" is legal, while "130", "310", "013", "031" is illegal. The biggest one of odd Integer is "301".
Input
There are multiple test cases. Please process till EOF.
Each case starts with a line containing an integer N ( 1 <= N <= 100 ).
The second line contains N Digits which indicate the digit $a_1, a_2, a_3, \cdots, a_n. ( 0 \leq a_i \leq 9)$.
Output
The output of each test case of a line. If you can constitute an Integer which is satisfied above conditions, please output the biggest one. Otherwise, output "-1" instead.
Sample Input
3 0 1 3 3 5 4 2 3 2 4 6
Sample Output
301 425 -1
#include <stdio.h> #include <string.h> #include <stdlib.h> #include <math.h> int main() { int a[110]; int n,i,j,k,m,t; int flag; while(~scanf("%d",&n)) { flag=0; for(i=0; i<n; i++) scanf("%d",&a[i]); for(i=0; i<n-1; i++) for(j=0; j<n-i-1; j++) if(a[j]<a[j+1]) { t=a[j]; a[j]=a[j+1]; a[j+1]=t; } for(i=n-1; i>=0; i--) { if(a[i]%2!=0) { k=i; m=a[i]; flag=1; break; } } if(flag==0) puts("-1"); else { for(i=k; i<n-1; i++) { a[i]=a[i+1]; } a[n-1]=m; if(a[0]==0)//前导是0则输出“-1” { puts("-1"); } else { for(i=0; i<n; i++) printf("%d",a[i]); printf("\n"); } } } return 0; }
相关文章推荐
- hdu 5055 Bob and math problem
- hdu5055——Bob and math problem
- HDU 5055 Bob and math problem(贪心)——BestCoder Round #11(div.2)
- HDU 5055 Bob and math problem
- hdu----(5055)Bob and math problem(贪心)
- hdu--5055 Bob and math problem
- HDU 5055 Bob and math problem(结构体)
- hdu 5055 Bob and math problem
- HDU 5055 Bob and math problem
- HDU 5055 Bob and math problem
- HDU 5055 Bob and math problem(构造)
- HDU 5055 Bob and math problem
- hdu 5055 Bob and math problem
- HDU-#5055 Bob and math problem(模拟)
- hdu 5055 Bob and math problem(模拟)
- 【CUGBACM15级BC第11场 B】hdu 5055 Bob and math problem
- hdu 5055 Bob and math problem
- HDU 5055 Bob and math problem
- HDU 5055 - Bob and math problem(贪心)
- HDU —— 5055 Bob and math problem