Revenge of Fibonacc

算法：搜索；

In mathematical terms, the sequence Fn of Fibonacci numbers is defined by the recurrence relation
Fn = Fn-1 + Fn-2
with seed values F1 = 1; F2 = 1 (sequence A000045 in OEIS).
---Wikipedia

Today, Fibonacci takes revenge on you. Now the first two elements of Fibonacci sequence has been redefined as A and B. You have to check if C is in the new Fibonacci sequence.


Input
The first line contains a single integer T, indicating the number of test cases.

Each test case only contains three integers A, B and C.

[Technical Specification]
1. 1 <= T <= 100
2. 1 <= A, B, C <= 1 000 000 000


Output
For each test case, output “Yes” if C is in the new Fibonacci sequence, otherwise “No”.


Sample Input
3
2 3 5
2 3 6
2 2 110


Sample Output
Yes
No
Yes

代码：

#include <iostream>
   #include <string>
   #include <iomanip>
   #include <cstring>
   #include <algorithm>
   #include <queue>
   #include <stdio.h>
   using namespace std;
   long long n,m,k;
   long long s;
   long long dfs(long long x,long long y)
   {
   	    s=x+y;
   	    if(s==k) return 1;
   	    if(x==k) return 1;
   	    if(y==k) return 1;
   	    if(s>k&&k!=x&&k!=y) return 0;
   	    dfs(y,s);
   }
   int main()
   {
   	  int t;
   	  cin>>t;
   	  while(t--)
   	  {    cin>>n>>m>>k;
		        int ans=dfs(n,m);
		   	    if(ans) cout<<"Yes"<<endl;
   	  	        else cout<<"No"<<endl;
	  }
	  return 0;
   }