// 入力フォーマットチェック
#include<bits/stdc++.h>
using namespace std;

using ll = long long;

#define UNTIE ios_base::sync_with_stdio( false ); cin.tie( nullptr ) 
#define CIN( LL , A ) LL A; cin >> A 
#define TYPE_OF( VAR ) remove_const<remove_reference<decltype( VAR )>::type >::type
#define FOR( VAR , INITIAL , FINAL_PLUS_ONE ) for( TYPE_OF( FINAL_PLUS_ONE ) VAR = INITIAL ; VAR < FINAL_PLUS_ONE ; VAR ++ ) 
#define REPEAT( HOW_MANY_TIMES ) FOR( VARIABLE_FOR_REPEAT , 0 , HOW_MANY_TIMES ) 
#define QUIT return 0 
#define CHECK_REDUNDANT_INPUT string VARIABLE_FOR_CHECK_REDUNDANT_INPUT = ""; cin >> VARIABLE_FOR_CHECK_REDUNDANT_INPUT; assert( VARIABLE_FOR_CHECK_REDUNDANT_INPUT == "" ); assert( ! cin );


int main()
{
  UNTIE;
  constexpr const ll bound = 1000000;
  CIN( ll , N );
  assert( 0 <= N && N <= bound );
  CIN( int , I );
  assert( 1 <= I && I <= bound );
  ll B , C;
  REPEAT( I ){
    cin >> B >> C;
    assert( 0 <= B && B <= bound );
    assert( -bound <= C && C <= bound );
  }
  CHECK_REDUNDANT_INPUT;
  QUIT;
}