Cod sursa(job #2283359)

Utilizator danielsociuSociu Daniel danielsociu Data 15 noiembrie 2018 14:27:28
Problema Al k-lea termen Fibonacci Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.78 kb
#include <fstream>
std::ifstream cin("kfib.in");
std::ofstream cout("kfib.out");
#define ll long long
#define MOD 666013
ll sol[2][2],nr[2][2],k;

void inmultire(ll a[][2],ll b[][2]){
    int aux1[2][2],aux2[2][2];
    aux1[0][1]=aux1[1][0]=aux1[1][1]=1;
    aux2[0][1]=aux2[1][0]=aux2[1][1]=1;
    aux1[0][0]=aux2[0][0]=0;
    for(int i=0;i<2;i++)
        for(int j=0;j<2;j++)
            for(int k=0;k<2;k++)
                a[i][j]=(a[i][j]+aux1[i][k]*aux2[k][j])%MOD;
}

void ridput(ll sol[2][2],ll k){
    sol[0][1]=sol[1][0]=sol[1][1]=1;
    nr[0][1]=nr[1][0]=nr[1][1]=1;
    for(int i=0;(1<<i)<k;i++){
        if((1<<i)&k)
            inmultire(sol,nr);
        inmultire(nr,nr);
    }
}

int main()
{
    cin>>k;
    ridput(sol,k);
    cout<<sol[1][1];
}