#include<bits/stdc++.h> using namespace std; int n,m,a[1001][1001],cnt; int main(){ cin>>n>>m; for(int i=1;i<=n;i++){ for(int j=1;j<=n;j++){ cin>>a[i][j]; } } int big=-1; for(int c=1;c<=n;c++){ for(int b=1;b<=m;b++){ if(a[c][b]>big)big=a[c][b]; } cnt=cnt+big; } cout<<cnt; return 0; }