Cod sursa(job #2991102)

Utilizator rusepetruRuse Petru rusepetru Data 9 martie 2023 09:28:27
Problema Al k-lea termen Fibonacci Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.75 kb
#include <fstream>
using namespace std;
ifstream f("kfib.in");
ofstream g("kfib.out");
long long a[2][2]={{0,1},{0,0}};
long long c[2][2]={{0,1},{1,1}};
long long sol[2][2]={{1,0},{0,1}};
void inmultire(long long a[2][2],long long b[2][2])
{
    long long c[2][2];
    int i,j,k;
    for(i=0;i<2;i++)
    for(j=0;j<2;j++)
    {
        c[i][j]=0;
        for(k=0;k<2;k++)c[i][j]+=a[i][k]*b[k][j];
        c[i][j]=c[i][j]%666013;
    }
    for(i=0;i<2;i++)
    for(j=0;j<2;j++)a[i][j]=c[i][j];
}
void putere(long long sol[2][2],int k)
{
    while(k)
    {
        if(k%2==1){inmultire(sol,c);k--;}
        else {inmultire(c,c);k=k/2;}}
    }

int main()
{int n;
f>>n;
putere(sol,n);
inmultire(a,sol);
g<<a[0][0];
    return 0;
}