> #include <iostream>
> #include <stdio.h>
> #include <string>
> #include <string.h>
> using namespace std;
> int a[10000],count ;
> string s;
> char te;
> int main()
> {int n;
> 
> while(cin>>n)
> {s="";
> memset(a,0,sizeof(a));
> int pan=0;
> while(cin>>te)
> {s+=te;
> if(te=='(')pan++;
> else if(te==')')pan--;
> if(pan==0)break;
> }
> 
> 
> bool p=0;
> int i=0,t=0;
> count=0;
> while(i<s.length())
> {
> 	
> 	if(s[i]=='(')
> 	{i++;
> 	if(s[i]==')')i++;
> 	else {
> 
> 
> 		if(s[i]=='-'){i++;
> 		while(s[i+1]!='('&&s[i+1]!=')')
> 		{a[t]=int(s[i]-'0');
> 		a[t]=a[t]*10;
> 		i++;
> 		}
> 		
> 		a[t]+=int(s[i]-'0');
> 		i++;
> 		count-=a[t];
> 		}
> 		else{
> 			while(s[i+1]!='('&&s[i+1]!=')')
> 		{a[t]=int(s[i]-'0');
> 		a[t]=a[t]*10;
> 		i++;
> 		}
> 		
> 		a[t]+=int(s[i]-'0');
> 		i++;
> 		count+=a[t];
> 		
> 		}
> 		
> 		
> 		t++;
> 		
> 	}
> 	
> 	}
> 	if(s[i]==')')
> 	{	if(count==n&&s[i-4]=='('){
> 		cout<<"yes"<<endl;
> 		p=1;
> 		break;}
> 	
> 	t--;
> 	count-=a[t];
> 	i++;
> 	a[t]=0;}
> 	
> }
> 
> if(p==0)cout<<"no"<<endl;
> }
> 
> 
> return 0;}