#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES

#ifdef _MSC_VER
#include "bits\stdc++.h"
#else
#include <bits/stdc++.h>
#endif
#include <vector>
#include <set>
#include <string>
#include <queue>
#include <list>
#define REP(i,a,b) for(i=a;i<b;i++)
#define rep(i,n) REP(i,0,n)
// #define rep(i,n) REP(i,1,n)
#define ll long long
#define ull unsigned ll
typedef long double ld;
#define SQR(X)  ( (X)*(X) )
#define CUBE(X) ( (X)*(X)*(X) )

// #define int ll

using namespace std;

bool test = 0;

/* ここからが本編 */

int main(void)
{
  int i,j,k,l;
  int a,b;
  cin >> a >> b;
  for(i=1;i<205;i++) {
    for(j=0;j<=i;j++) {
      double c = 100.0*j/i;
      double d = 100.0*(i-j)/i;
      if(a-0.5 <= c && c < a+0.5 
        && b-0.5 <= d && d < b+0.5) goto end;
    }
  }
  end:
  cout << i << endl;
  return 0;
}