# include<iostream> # include<cstring> # include<cmath> using namespace std; int main() { int n,m; double z,c=0; cin>>n>>m; int a[n][m],b[n][m]; for(int i=0;i<n;i++){ for(int j=0;j<m;j++){ cin>>a[i][j]; } } for(int i=0;i<n;i++){ for(int j=0;j<m;j++){ cin>>b[i][j]; } } for(int i=0;i<n;i++){ for(int j=0;j<m;j++){ if(a[i][j]==b[i][j]){ c++; } } } z=c*100.0/(n*m); printf("%.2lf",z); return 0; }