Cod sursa(job #3368720)

Utilizator Iulya10Toader Iulia Iulya10 Data 15 octombrie 2026 16:06:22
Problema Al k-lea termen Fibonacci Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.96 kb
#include <bits/stdc++.h>
# define M 666013
using namespace std;
ifstream fin("kfib.in");
ofstream fout("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}};
int n;
void mult(long long a[2][2], long long b[2][2])
{
    long long c[2][2];
    int i,j,k;
    for(int i=0;i<=1;i++)
        for(int j=0;j<=1;j++)
    {
        c[i][j]=0;
        for(int k=0;k<=1;k++)
            {
                c[i][j]+=a[i][k]*b[k][j];
                c[i][j]=c[i][j]%M;
            }
    }
    for(int i=0;i<=1;i++)
        for(int j=0;j<=1;j++)
        a[i][j]=c[i][j];
}
void put(long long sol[2][2], int n)
{
    while(n)
    {
        if(n%2==1)
        {
            mult(sol,c);
            n--;
        }
        else
        {
            mult(c,c);
            n/=2;
        }
    }
}
int main()
{
    fin>>n;
    put(sol,n);
    mult(a,sol);
    fout<<sol[0][1];
    return 0;
}