Codeforces Round #257 (Div. 2) B Jzzhu and Sequences
2014-07-20 10:27
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Jzzhu has invented a kind of sequences, they meet the following property:
You are given x and
y, please calculate fn modulo
1000000007 (109 + 7).
Input
The first line contains two integers x and
y (|x|, |y| ≤ 109). The second line contains a single integer
n (1 ≤ n ≤ 2·109).
Output
Output a single integer representing fn modulo
1000000007 (109 + 7).
Sample test(s)
Input
Output
Input
Output
Note
In the first sample, f2 = f1 + f3,
3 = 2 + f3,
f3 = 1.
In the second sample, f2 = - 1;
- 1 modulo (109 + 7) equals
(109 + 6).
详见代码。。。
You are given x and
y, please calculate fn modulo
1000000007 (109 + 7).
Input
The first line contains two integers x and
y (|x|, |y| ≤ 109). The second line contains a single integer
n (1 ≤ n ≤ 2·109).
Output
Output a single integer representing fn modulo
1000000007 (109 + 7).
Sample test(s)
Input
2 3 3
Output
1
Input
0 -12
Output
1000000006
Note
In the first sample, f2 = f1 + f3,
3 = 2 + f3,
f3 = 1.
In the second sample, f2 = - 1;
- 1 modulo (109 + 7) equals
(109 + 6).
详见代码。。。
#include<iostream> using namespace std; #define modulo 1000000007 int main() { __int64 q[6]; int m,n; int k; while(~scanf("%d%d",&m,&n)) { q[1]=m; q[2]=n; q[3]=n-m; q[4]=-m; q[5]=-n; q[0]=m-n; cin>>k; k=k%6; while(q[k]<0) q[k]=q[k]+modulo; printf("%I64d\n",q[k]%modulo); } return 0; }
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