#include <cstdio>#include <iostream>#include <cstring>using namespace std;double g_ans[34][43]={{},{},{0,0,2.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,2.00,3.36,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,3.00,3.00,6.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,3.96,3.36,3.47,6.85,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,4.61,4.97,4.91,3.78,8.37,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,5.59,5.58,6.00,5.33,5.01,9.45,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,6.53,6.49,6.52,6.40,5.87,5.37,12.42,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,7.40,7.52,7.67,6.85,7.07,6.29,6.83,14.02,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,8.34,8.38,8.55,7.85,7.51,7.58,7.90,7.48,15.52,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,9.26,9.33,9.46,8.68,8.37,7.83,9.50,8.69,8.16,17.07,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,10.17,10.26,10.44,9.50,9.19,8.68,9.71,10.29,9.58,8.92,18.69,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,11.10,11.18,11.36,10.37,9.97,9.45,10.71,10.44,11.07,10.30,9.83,20.45,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,12.02,12.11,12.31,11.21,10.79,10.15,11.62,11.47,11.17,11.89,11.09,10.62,22.45,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,12.94,13.04,13.25,12.06,11.59,10.92,12.42,12.34,12.21,11.94,12.78,11.96,11.55,24.06,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,13.87,13.97,14.19,12.91,12.40,11.66,13.32,13.13,13.05,12.96,12.77,13.76,12.98,12.31,25.70,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,14.79,14.90,15.14,13.76,13.21,12.41,14.18,14.02,13.82,13.80,13.78,13.65,14.86,13.82,13.10,27.39,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,15.71,15.82,16.08,14.61,14.01,13.16,15.04,14.86,14.70,14.56,14.62,14.69,14.69,15.72,14.66,13.92,29.11,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,16.64,16.75,17.02,15.46,14.82,13.91,15.92,15.71,15.52,15.43,15.37,15.54,15.77,15.50,16.61,15.50,14.77,30.86,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,17.56,17.68,17.97,16.31,15.63,14.66,16.78,16.57,16.36,16.24,16.23,16.29,16.63,16.58,16.33,17.53,16.36,15.59,32.61,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,18.48,18.61,18.91,17.16,16.44,15.40,17.65,17.42,17.21,17.07,17.04,17.15,17.38,17.44,17.42,17.18,18.47,17.25,16.42,34.29,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,19.41,19.54,19.85,18.00,17.24,16.15,18.52,18.28,18.04,17.90,17.86,17.96,18.27,18.18,18.27,18.28,18.06,19.43,18.13,17.23,35.99,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,20.33,20.47,20.79,18.85,18.05,16.90,19.39,19.13,18.88,18.73,18.69,18.79,19.09,19.06,19.01,19.14,19.17,18.94,20.38,18.99,18.05,37.70,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,21.25,21.39,21.74,19.70,18.86,17.65,20.26,19.99,19.72,19.56,19.51,19.62,19.93,19.88,19.89,19.87,20.03,20.08,19.83,21.29,19.85,18.87,39.43,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,22.18,22.32,22.68,20.55,19.67,18.40,21.13,20.84,20.56,20.39,20.34,20.45,20.78,20.72,20.70,20.75,20.76,20.94,20.98,20.68,22.22,20.71,19.70,41.15,1000.00,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,23.10,23.25,23.62,21.40,20.48,19.15,22.00,21.70,21.40,21.22,21.16,21.28,21.61,21.56,21.54,21.56,21.64,21.66,21.84,21.85,21.54,23.16,21.58,20.52,42.86,1000.00,1000.00,1000.00,1000.00,1000.00},{0,0,24.02,24.18,24.57,22.25,21.29,19.90,22.87,22.55,22.24,22.05,21.99,22.10,22.45,22.39,22.37,22.39,22.45,22.55,22.56,22.71,22.72,22.41,24.09,22.45,21.34,44.57,1000.00,1000.00,1000.00,1000.00},{0,0,24.95,25.11,25.51,23.10,22.09,20.64,23.74,23.41,23.08,22.87,22.81,22.93,23.30,23.23,23.20,23.23,23.28,23.36,23.45,23.42,23.58,23.60,23.29,25.03,23.32,22.16,46.28,1000.00,1000.00,1000.00},{0,0,25.87,26.04,26.45,23.95,22.90,21.39,24.61,24.26,23.92,23.70,23.64,23.76,24.14,24.06,24.04,24.06,24.12,24.19,24.26,24.31,24.29,24.47,24.49,24.16,25.97,24.18,22.98,48.00,1000.00,1000.00},{0,0,26.79,26.96,27.40,24.80,23.71,22.14,25.48,25.11,24.76,24.53,24.46,24.58,24.98,24.90,24.87,24.89,24.95,25.03,25.10,25.12,25.18,25.17,25.36,25.38,25.03,26.90,25.05,23.81,49.72,1000.00},{0,0,27.71,27.89,28.34,25.65,24.52,22.89,26.35,25.97,25.60,25.36,25.29,25.41,25.82,25.73,25.70,25.72,25.78,25.86,25.94,25.95,25.99,26.07,26.05,26.24,26.26,25.89,27.83,25.92,24.63,51.43}};int main(){ int n,m; while (cin>>n>>m) { printf("%0.2fn",g_ans[n][m]); } return 0;}
