Submission #2071490


Source Code Expand

#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
signed main(){
  Int n;
  cin>>n;
  vector<Int> a(n),b(n);
  for(Int i=0;i<n;i++) cin>>a[i];
  for(Int i=0;i<n;i++) cin>>b[i];

  using P = pair<Int, Int>;
  vector<P> v;
  for(Int i=0;i<n;i++) v.emplace_back(a[i],0);
  for(Int i=0;i<n;i++) v.emplace_back(b[i],1);

  sort(v.begin(),v.end());

  Int ans=1;
  const Int MOD = 1e9+7;
  Int x=0,y=0;
  for(Int i=0;i<(Int)v.size();i++){
    if(v[i].second==0){
      if(y) ans*=y--;
      else x++;
    }else{
      if(x) ans*=x--;
      else y++;
    }
    ans%=MOD;
  }

  cout<<ans<<endl;
  return 0;
}

Submission Info

Submission Time
Task A - 1D Matching
User beet
Language C++14 (GCC 5.4.1)
Score 500
Code Size 675 Byte
Status AC
Exec Time 106 ms
Memory 7536 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 500 / 500
Status
AC × 2
AC × 14
Set Name Test Cases
Sample example0.txt, example1.txt
All 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, example0.txt, example1.txt
Case Name Status Exec Time Memory
000.txt AC 60 ms 3316 KB
001.txt AC 22 ms 1784 KB
002.txt AC 30 ms 1912 KB
003.txt AC 34 ms 2932 KB
004.txt AC 88 ms 6896 KB
005.txt AC 98 ms 7152 KB
006.txt AC 106 ms 7024 KB
007.txt AC 98 ms 7152 KB
008.txt AC 98 ms 6768 KB
009.txt AC 98 ms 7536 KB
010.txt AC 98 ms 7024 KB
011.txt AC 98 ms 6256 KB
example0.txt AC 1 ms 256 KB
example1.txt AC 1 ms 256 KB