XJTU Summer Holiday Test 1(Divisibility by Eight-8的倍数)

C - Divisibility by Eight

Time Limit:2000MS     Memory Limit:262144KB     64bit IO Format:%I64d
& %I64u

Submit 

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Description

You are given a non-negative integer n, its decimal representation consists of at most 100 digits and doesn't contain leading zeroes.

Your task is to determine if it is possible in this case to remove some of the digits (possibly not remove any digit at all) so that the result contains at least one digit, forms a non-negative integer, doesn't have leading zeroes and is divisible by 8.
After the removing, it is forbidden to rearrange the digits.

If a solution exists, you should print it.

Input

The single line of the input contains a non-negative integer n. The representation of number n doesn't contain any leading zeroes
and its length doesn't exceed 100 digits.

Output

Print "NO" (without quotes), if there is no such way to remove some digits from number n.

Otherwise, print "YES" in the first line and the resulting number after removing digits from number n in the second line. The printed number must be divisible
by 8.

If there are multiple possible answers, you may print any of them.

Sample Input

Input

3454

Output

YES
344

Input

10

Output

YES
0

Input

111111

Output

NO

8*125=1000 故一个数是8的倍数当且仅当它末尾3个数是8的倍数

所以答案最多有3位，暴力就可以

#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<algorithm>
#include<functional>
#include<iostream>
#include<cmath>
#include<cctype>
#include<ctime>
using namespace std;
#define For(i,n) for(int i=1;i<=n;i++)
#define Fork(i,k,n) for(int i=k;i<=n;i++)
#define Rep(i,n) for(int i=0;i<n;i++)
#define ForD(i,n) for(int i=n;i;i--)
#define RepD(i,n) for(int i=n;i>=0;i--)
#define Forp(x) for(int p=pre[x];p;p=next[p])
#define Forpiter(x) for(int &p=iter[x];p;p=next[p])
#define Lson (x<<1)
#define Rson ((x<<1)+1)
#define MEM(a) memset(a,0,sizeof(a));
#define MEMI(a) memset(a,127,sizeof(a));
#define MEMi(a) memset(a,128,sizeof(a));
#define INF (2139062143)
#define F (100000007)
#define MAXN (100000+10)
typedef long long ll;
ll mul(ll a,ll b){return (a*b)%F;}
ll add(ll a,ll b){return (a+b)%F;}
ll sub(ll a,ll b){return (a-b+(a-b)/F*F+F)%F;}
void upd(ll &a,ll b){a=(a%F+b%F)%F;}
char s[MAXN];
int main()
{
//	freopen("I.in","r",stdin);
//	freopen(".out","w",stdout);

	scanf("%s",s);
	char *pch=strstr(s,"AB");
	if (pch!=NULL&&strstr(pch+2,"BA")!=NULL)
	{
		cout<<"YES"<<endl;
		return 0;
	}
	pch=strstr(s,"BA");
	if (pch!=NULL&&strstr(pch+2,"AB")!=NULL)
	{
		cout<<"YES"<<endl;
		return 0;
	}
	cout<<"NO"<<endl;

	return 0;
}