#include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <stack>
#include <map>
#include <algorithm>
#include <set>
#include <sstream>
#include <utility>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cmath>
#include <cctype>
#include <climits>
#include <iostream>
#include <iomanip>
using namespace std;

typedef long long ll;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) for(int i=0;i<(n);++i)

#include <iostream>
using namespace std;

int main(){
    int a,b;
    cin>>a>>b;
    int minSum = 1000000;
    for(int i = 0;i <=1000;i++)
    {
        for(int j = 0;j <= 1000;j++)
        {
            if(i == 0 && j == 0)
            {
                continue;
            }
            double sum = i + j;
            if((int) (round((double)(i*100) / sum)) == a)
            {
                if((int) (round((double)(j*100) / sum)) == b)
                {
                    minSum = min(minSum, (int)sum);
                }
            }
        }
    }
    cout << minSum << endl;
    return 0;
}