#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,m;
    cin>>n>>m;
    vector<long long>arr(m);
    long long cnt=0;
    while(n--){
    for(long long &num : arr){
        cin>>num;
        cnt+=num;
    }
    }
    cout<<cnt<<endl;
    return 0;
}