#include <iostream> #include <bits/stdc++.h> using namespace std; int main() { int a,b,d; cin>>a>>b; double f; d=a*b; int c,aa[666],bb[666],count=0; for(int i=0;i<d;i++){ cin>>c; aa[i]=c; } for(int i=0;i<d;i++){ cin>>c; bb[i]=c; } for(int i=0;i<d;i++){ if(aa[i]==bb[i]){ count++; } } f=count*100/d+0.44; cout<<fixed<<setprecision(2)<<f; return 0; }