Revenge of Fibonacci
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)
Total Submission(s): 372 Accepted Submission(s): 177
Problem Description
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 Hint For the third test case, the new Fibonacci sequence is: 2, 2, 4, 6, 10, 16, 26, 42, 68, 110…
水题,fibonacci数不会超过45个就会超范围了,所以最多只有45个有用。
代码:
//0ms #include <iostream> #include <cstdio> #include <cstring> using namespace std; long long a[50]; int main() { int t; long long c; scanf("%d",&t); while(t--) { scanf("%I64d%I64d%I64d",&a[0],&a[1],&c); if(a[0]==c||a[1]==c) { printf("Yes\n"); continue; } int sign=0; for(int i=2;i<50;i++) { a[i]=a[i-1]+a[i-2]; if(a[i]==c) { sign=1; break; } } if(sign) printf("Yes\n"); else printf("No\n"); } return 0; }