参考代码

#include#includeusing namespace std;
int main(){
      int n;
      static int a0=0;
            static int a1=0;
            static int a2=0;
     cin>>n;
     while(n--){
      string str;
            cin>>str;
            int a[3]={0};
            int temp=0;
            for(int i=0;ia0){
        	if(a[1]%2==0){
            	a1=a[1];a2=a[2];a0=a[0];
            }
        }
		else{
        	if(a[0]==a0){
        
               if(a[1]>a1&&a[1]%2==0){
                	a1=a[1];a2=a[2];a0=a[0];
               }else{
               if(a[1]==a1&&a2<a[2]){
               		a1=a[1];a2=a[2];a0=a[0];
               }
               }
            }
        }

      }
if(a0!=0&&a1%2==0){
	cout<<a0<<"."<<a1;
if(a2!=0){cout<<"."<<a2<<endl;}
}else{
	cout<<"no stable available"<<endl;
}
	return 0;
}
			

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