Atcoder Beginner Contest001

a.cpp

#include<iostream>
#include<vector>
#include<cstdio>
#include<string>
#include<algorithm>
#include<numeric>
#include<map>
#include<math.h>

using namespace::std;

int main(void)
{

  int H1,H2;

  cin >> H1;
  cin >> H2;

  cout << H1 - H2 << endl;

  return 0;
}

b.cpp

#include<iostream>
#include<vector>
#include<cstdio>
#include<string>
#include<algorithm>
#include<numeric>
#include<map>
#include<math.h>

using namespace::std;

int main(void)
{

  int m;
  int vv;

  cin >> m;

  if( m < 100 )
    {
      vv = 0;
    }
  else if( 100 <= m && m <= 5000 )
    {
      vv = m / 100;
    }
  else if( 6000 <= m && m <= 30000 )
    {
      vv = (m / 1000) + 50;
    }
  else if( 35000 <= m && m <= 70000 )
    {
      vv = ( ( m / 1000 ) - 30 ) / 5 + 80;
    }
  else
    {
      vv = 89;
    }

  if( m < 1000 )
    {
      cout << 0;
    }
  cout << vv << endl;

  return 0;
}