제출 #964328

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
964328	2024-04-16 16:15:27	vjudge1	Fibonacci representations (CEOI18_fib)	C++14	100 / 100	646 ms	32444 KiB

fib

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#include<bits/stdc++.h>
using namespace std;
#define int long long
const int mod=1e9+7;
struct Matrix{
   int data[2][2];
   Matrix (int x=0){
      for (int i=0; i<2; ++i) for (int j=0; j<2; ++j) data[i][j]=(i==j)&x;
   }
   auto & operator[](int x){ return data[x]; }
   const auto & operator[](int x) const { return data[x]; }
   Matrix operator*(const Matrix &b){
      Matrix c;
      for (int i=0; i<2; ++i) for (int k=0; k<2; ++k) for (int j=0; j<2; ++j){
         c[i][j]=(c[i][j]+data[i][k]*b[k][j])%mod;
      }
      return c;
   }
   Matrix pow(int y){
      Matrix x=*this, t(1);
      while (y){
         if (y&1) t=t*x;
         x=x*x;
         y>>=1;
      }
      return t;
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 20 / 20
• Subtask 3: 15 / 15
• Subtask 4: 10 / 10
• Subtask 5: 15 / 15
• Subtask 6: 35 / 35