Cod sursa(job #3254397)

Utilizator Lupu_Daniel_24Lupu Daniel Lupu_Daniel_24 Data 7 noiembrie 2024 15:18:07
Problema Al k-lea termen Fibonacci Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.92 kb
#include <bits/stdc++.h>
#define ll long long
#define MOD 666013

using namespace std;
ifstream f("kfib.in");
ofstream g("kfib.out");
ll c[2][2]= {{0,1},{1,1}};
ll sol[2][2]= {{1,0},{0,1}};
ll a[2][2]= {{0,1},{0,0}};

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



        }
    for(i=0; i<=1; i++)
        for(j=0; j<=1; j++)
            a[i][j]=c[i][j];
}

void putere(ll sol[2][2],ll n)
{
    while(n)
    {
        if(n%2==1)
        {
            inmultire(sol,c);
            n--;
        }
        else
        {
            inmultire(c,c);
            n/=2;
        }
    }
}
int main()
{
    int n;


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