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Cod sursa(job #641523)
#include<cstdio>
#include<cstring>
#include<fstream>
using namespace std;
int z[2][2],sol[2][2],tmp[2][2],n;
void inmultire(int a[][2],int b[][2]) {
int i,j,k;
for(i=0;i<2;i++)
for(j=0;j<2;j++)
for(k=0;k<2;k++)
tmp[i][j]+=(1LL*a[i][k]*b[k][j])%666013;
}
inline void mat_pow(int p) {
int i;
for (i=0;(1<<i)<=p;i++) {
if(p&(1<<i)) {
memset(tmp,0,sizeof(tmp));
inmultire(sol,z);
memcpy(sol,tmp,sizeof(tmp));
}
memset(tmp,0,sizeof(tmp));
inmultire(z,z);
memcpy(z,tmp,sizeof(tmp));
}
}
int main() {
ifstream in("kfib.in");
in>>n;
in.close();
z[0][1]=z[1][1]=z[1][0]=1;
sol[0][0]=sol[1][1]=1;
mat_pow(n-1);
ofstream out("kfib.out");
out<<sol[1][1];
out.close();
}