UVA
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Let’s define another number sequence, given by the following function:
f(0) = a
f(1) = b
f(n) = f(n − 1) + f(n − 2), n > 1
When a = 0 and b = 1, this sequence gives the Fibonacci Sequence. Changing the values of a andb, you can get many different sequences. Given the values of a, b, you have to find the last m digits off(n).
Input The first line gives the number of test cases, which is less than 10001. Each test case consists of asingle line containing the integers a b n m. The values of a and b range in [0, 100], value of n ranges in[0, 1000000000] and value of m ranges in [1, 4].
Output For each test case, print the last m digits of f(n).
However, you should NOT print any leading zero.
Sample Input
4
0 1 11 3
0 1 42 4
0 1 22 4
0 1 21 4
Sample Output
89
4296
7711
946
#include <iostream>#include <cstdio>#include <cstdlib>#include <string>#include <cmath>#include <algorithm>#include <cstring>#include <map>#include <sstream>#include <queue>#include <stack>#include <vector>using namespace std;#define INF 0x3f3f3f3f#define Mem(a,x) memset(a,x,sizeof(x))#define For(i,a,b) for(int i = a; i<b; i++)#define ll long long#define MAX_N 100010typedef vector<int> vec;typedef vector<vec> mat;int m;int mod[4] = {10,100,1000,10000};mat mul(mat &A,mat &B){ mat C(A.size(),vec(B[0].size())); for(int i = 0; i<A.size(); i++) { for(int k = 0; k<B.size(); k++) { for(int j = 0; j<B[0].size(); j++) { C[i][j] = C[i][j] + A[i][k]*B[k][j]; C[i][j] %= mod[m-1]; } } } return C;}mat pow(mat A,ll n){ mat B(A.size(),vec(A.size())); for(int i = 0; i<A.size(); i++) B[i][i] = 1; while(n > 0) { if(n & 1) B = mul(B,A); A = mul(A,A); n >>= 1; } return B;}int main(){ int t; scanf("%d",&t); while(t--) { int x[10]; Mem(x,0); int a,b; ll n; scanf("%d%d%lld%d",&a,&b,&n,&m); mat A(2,vec(2)); A[0][0] = 1,A[0][1] = 1; A[1][0] = 1,A[1][1] = 0; A = pow(A,n); mat ans(2,vec(1)); ans[0][0] = b,ans[1][0] = a; ans = mul(A,ans); printf("%d\n",ans[1][0]); } return 0;}
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