A-robot bicorn attack

Description

Vasya plays robot bicorn attack.

The game consists of three rounds. for each one a non-negative integer amount of points is given. the result of the game is the sum of obtained points. vasya has already played three rounds and wrote obtained points one by one (without leading zeros) into the stringS. Vasya decided to brag about his achievement to the friends. However, he has forgotten how many points he got for each round. The only thing he remembers is the stringS.

Help Vasya to find out what is the maximum amount of points he cocould get. Take into account that Vasya played robot bicorn attack for the first time, so he cocould not get more than 1000000 (10^{6) points for one round.}

Input

The only line of input contains non-empty stringSObtained by Vasya. The string consists of digits only. the string length does not exceed 30 characters.

Output

Print the only number-the maximum amount of points Vasya cocould get. If Vasya is wrong and the string cocould not be obtained according to the rules then output number-1.

Sample Input

Input

1234

Output

37

Input

9000

Output

90

Input

0009

Output

-1

 1 #include <stdio.h> 2 #include <string.h> 3 #define LL __int64 4  5 int main() 6 { 7     int i,j,k,n,a,b,c,max,l,flag=0; 8     char s[32]; 9     gets(s);10     max=a=0;11     n=strlen(s);12     for(i=0;i<n-2;i++)13     {14         a=a*10+s[i]-‘0‘;15         if(a>1000000)break;16         b=0;17         for(j=i+1;j<n-1;j++)18         {19             b=b*10+s[j]-‘0‘;20             if(b>1000000)break;21             l=c=0;22             for(k=j+1;k<n;k++)23             {24                 c=c*10+s[k]-‘0‘;25                 if(c>1000000)break;26                 if(c==0&&s[k]==‘0‘&&k!=n-1)27                     break;28             }29             if(k==n&&c<=1000000)l=flag=1;30             if(l)31             {32                 if(max<a+b+c)max=a+b+c;33     //            printf("%d %d %d\n",a,b,c);34             }35             if(b==0&&s[j]==‘0‘)break;36         }37         if(a==0&&s[i]==‘0‘)break;38     }39     if(flag)printf("%d\n",max);40     else puts("-1");41     return 0;42 }

 

A-robot bicorn attack