福建师范大学1770（B）

福建师范大学1770（B）

http://acm.fjnu.edu.cn/show?problem_id=1770

import  java.util. * ;
import  java.io. * ;

public   class  ACM_1770 {
    
    public static void main(String rgs[]) throws Exception
    {
        BufferedReader stdin = 
            new BufferedReader(
                new InputStreamReader(System.in));
        String line = stdin.readLine(); 
        int i,j,n = Integer.parseInt(line); 
        String[] s=new String[n+1];
        int[] a=new int[n+1];
        int count=0;
        Arrays.fill(a,0);
        for(i=1;i<=n;i++)
            s[i] = stdin.readLine();
        i=1;
        while(true){
            StringTokenizer st = new StringTokenizer(s[i]);
            String t=st.nextToken();
            if(a[i]==1){
                count=0;
                break;
            }
            a[i]=1;
            count++;
            if(t.equals("jmp")){
                j=Integer.parseInt(st.nextToken());
                i=j;
                continue;
            }
            i++;                
            if(i>n)
                break;
        }
        System.out.println(count);
    }
}