Cod sursa(job #1743060)

Utilizator adimiclaus15Miclaus Adrian Stefan adimiclaus15 Data 17 august 2016 15:18:31
Problema Al k-lea termen Fibonacci Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.95 kb
#include <iostream>
#include <fstream>
using namespace std;
long long A[2][2]={{1,1},{0,0}},C[2][2]={{0,1},{1,1}},Sol[2][2]={{1,0},{0,1}},n;
void inmultire(long long a[][2],long long b[][2])
{
    int c[2][2];
    for(int i=0;i<2;i++)
    {
        for(int j=0;j<2;j++)
        {
            c[i][j]=0;
            for(int k=0;k<2;k++)
            {
                c[i][j]=(c[i][j]+a[i][k]*b[k][j])%666013;
            }
        }
    }
    for(int i=0;i<2;i++)
    {
        for(int j=0;j<2;j++)
        {
            a[i][j]=c[i][j];
        }
    }
}
void ridicare(int n)
{
    while(n>0)
    {
        if(n%2==1)
        {
            n--;
            inmultire(Sol,C);
        }
        else
        {
            n=n/2;
            inmultire(C,C);
        }
    }
}
int main()
{
    ifstream f("kfib.in");
    ofstream g("kfib.out");
    f>>n;
    ridicare(n-1);
    inmultire(A,Sol);
    g<<A[0][0];
    return 0;
}