Cod sursa(job #2988385)

Utilizator coro19Vlad Coroban coro19 Data 4 martie 2023 10:57:12
Problema Al k-lea termen Fibonacci Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.71 kb
#include <iostream>
using namespace std;
int mod=666013;
int m[2][2];
int sol[2][2];
void multiply(int a[2][2],int b[2][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]+=1LL*a[i][k]*b[k][j];
            c[i][j]%=mod;
        }
    }
    for(int i=0;i<2;i++){
        for(int j=0;j<2;j++){
            a[i][j]=c[i][j];
        }
    }

}
int main(){
    m[0][0]=0;
    m[0][1]=m[1][0]=m[1][1]=1;
    sol[0][0]=sol[1][0]=sol[1][1]=0;
    sol[0][1]=1;
    int p;
    cin>>p;
    while(p){
        if(p%2){
        multiply(sol,m);
        }
        multiply(m,m);
        p/=2;
    }
    cout<<sol[0][0];
    return 0;
}