#include <iostream>

 using namespace std;

 int main()

 {

     int n;

     while(cin>>n){

         cout<<-n+<<endl;

     }

     return ;

 }

Problem Statement

The postal code in Atcoder Kingdom is A+B+1 characters long, its (A+1)-th character is a hyphen -, and the other characters are digits from 0 through 9.

You are given a string S. Determine whether it follows the postal code format in Atcoder Kingdom.

Constraints

• 1≤A,B≤5
• |S|=A+B+1
• S consists of - and digits from 0 through 9.

Sample Input 1

3 4

269-6650

Sample Output 1

Yes

The (A+1)-th character of S is -, and the other characters are digits from 0 through 9, so it follows the format.

Sample Input 2

1 1

---

Sample Output 2

No

S contains unnecessary -s other than the (A+1)-th character, so it does not follow the format.

Sample Input 3

1 2

7444

Sample Output 3

No

 #include <iostream>

 using namespace std;

 int main()

 {

     int a,b;

     while(cin>>a>>b){

         string s;

         cin>>s;

         int l=s.length();

         int flag=;

         for(int i=;i<l;i++){

             if(i==a&&s[i]!='-'){

                 flag=;

                 break;

             }

             if(i!=a&&!(s[i]<=''&&s[i]>='')){

                 flag=;

                 break;

             }

         }

         if(flag) cout<<"Yes"<<endl;

         else cout<<"No"<<endl;

     }

     return ;

 }