Uva 10591 Happy Number

Problem C	Happy Number
Time Limit	1 Second

解题思路：WA了我一次，没看Sample直接敲了！！忽略了第一个要输入的Case数量

 1 #include<iostream>
 2 #include<cstdio>
 3 #include<set>
 4 using namespace std;
 5 set<int>num;
 6 bool Traverse(int cur){
 7     int temp = cur, sum = 0;
 8     for(; temp != 0;){
 9         sum += (temp%10)*(temp%10);
10         temp /= 10;
11     }
12     if(sum == 1) return true;
13     else if(num.find(sum) == num.end()){
14         num.insert(sum);
15         return Traverse(sum);
16     }
17     else return false;
18 }
19 
20 int main(){
21     #ifndef ONLINE_JUDGE
22     freopen("input.txt", "r", stdin);
23     #endif
24     int n, T;
25     cin>>T;
26     for(int i=1; i<=T; ++i){
27         cin>>n;
28         num.clear();
29         num.insert(n);
30         if(Traverse(n)) cout<<"Case #"<<i<<": "<<n<<" is a Happy number."<<endl;
31         else cout<<"Case #"<<i<<": "<<n<<" is an Unhappy number."<<endl;
32     }
33     return 0;
34 }