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Cod sursa(job #969605)
#include <fstream>
#define MOD 666013
using namespace std;
ifstream f("kfib.in");
ofstream g("kfib.out");
int K,M[5][5],Z[5][5],Aux[5][5];
void mul(int A[][5],int B[][5],int C[][5])
{
for(int i=1;i<=3;i++)
for(int j=1;j<=3;j++)
{
C[i][j]=0;
for(int k=1;k<=3;k++)
C[i][j]=(C[i][j]+(1LL*A[i][k]*B[k][j])%MOD)%MOD;
}
}
void copy(int A[][5],int B[][5])
{
for(int i=1;i<=3;i++)
for(int j=1;j<=3;j++)
A[i][j]=B[i][j];
}
int main()
{
f>>K;K--;
M[1][1]=M[1][2]=1;
Z[1][2]=Z[2][1]=Z[2][2]=1;
while(K)
{
if(K%2==1)
{
mul(M,Z,Aux);
copy(M,Aux);
}
mul(Z,Z,Aux);
copy(Z,Aux);
K=K/2;
}
g<<M[1][1]<<"\n";
return 0;
}