#include<bits/stdc++.h> using namespace std; int n,a[999][999],b[999][999],c,m; int main(){ cin>>n>>m; for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ cin>>a[i][j]; } } for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ cin>>b[i][j]; } } for(int i=1;i<=n;i++){ for(int j=1;j<=m;j++){ if(a[i][j]==b[i][j])c++; } } printf("%.2f",c*100.0/(n*m)); } /************************************************************** Problem: 1407 User: chenxuanyi Language: C++ Result: Accepted Time:19 ms Memory:9872 kb ****************************************************************/